Littelfuse, Inc. Datasheets for Protective Relays and Monitoring Relays
Protective relays and monitoring relays detect or monitor for abnormal power system conditions.
Protective Relays and Monitoring Relays: Learn more
Page:
1
2
| Product Name | Notes |
|---|---|
| 777-LR-KW/HP-P2 three-phase current and voltage monitor provides protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 1–2 A (looped conductors required); 2.1–9.0 A... | |
| 777-MLR-KW/HP-P2 three-phase current and voltage monitor provides protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 0.5–5 A (looped conductors required); 5–21 A... | |
| AF0100-00 is an arc-flash relay with a supply voltage ac of 100–240 and a supply voltage dc of 24–48; 100–240. | |
| AF0100-10 is an arc-flash relay with a supply voltage dc of 24–48 (none for ac). | |
| AF0500-00 is an arc-flash relay with a supply voltage ac of 100–240. | |
| AF0500-00-CC is an arc-flash relay with a supply voltage dc of 110–250. | |
| D1100.0010 is a diode logic unit that is used for tripping a circuit breaker with multiple arc-flash relays. This unit measures 90x50x60 mm. | |
| EL-731-21-00 is an earth-leakage relay with a supply voltage dc of 24 and offers communications via DeviceNet™. | |
| EL3100-00 is a ground-fault relay with a supply voltage ac of 208–600 and measures 3.4H X 4.4W X 2.2D. | |
| EL731-00-00 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. | |
| EL731-00-10 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. | |
| EL731-01-00 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. Communications is offered via DeviceNet™. | |
| EL731-01-10 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. Communications is offered via DeviceNet™. | |
| EL731-02-00 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. Communications is offered via Profibus®. | |
| EL731-02-10 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. Communications is offered via DeviceNet™. | |
| EL731-03-00 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. Communications is offered via EtherNet-IP™. | |
| EL731-03-10 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. Communications is offered via EtherNet-IP™. | |
| EL731-04-00 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. Communications is offered via Modbus®TCP. | |
| EL731-04-10 is an earth-leakage relay with a supply voltage ac of 120–240 and a supply voltage dc of 120–240. Communications is offered via Modbus®TCP. | |
| EL731-10-00 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. | |
| EL731-10-10 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. | |
| EL731-11-00 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. Communications is offered via DeviceNet™. | |
| EL731-11-10 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. Communications is offered via DeviceNet™. | |
| EL731-12-00 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. Communications is offered via Profibus®. | |
| EL731-12-10 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. Communications is offered via DeviceNet™. | |
| EL731-13-00 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. Communications is offered via EtherNet-IP™. | |
| EL731-13-10 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. Communications is offered via EtherNet-IP™. | |
| EL731-14-00 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. Communications is offered via Modbus®TCP. | |
| EL731-14-10 is an earth-leakage relay with a supply voltage ac of 24 and a supply voltage dc of 48. Communications is offered via Modbus®TCP. | |
| EL731-20-00 is an earth-leakage relay with a supply voltage dc of 24 and measures 1.9H X 3.8W X 5.0D. | |
| EL731-20-10 is an earth-leakage relay with a supply voltage dc of 24 and measures 1.9H X 3.8W X 5.0D. | |
| EL731-21-10 is an earth-leakage relay with a supply voltage dc of 24 and offers communications via DeviceNet™. | |
| EL731-22-00 is an earth-leakage relay with a supply voltage dc of 24 and offers communications via Profibus®. | |
| EL731-22-10 is an earth-leakage relay with a supply voltage dc of 24 and offers communications via Profibus®. | |
| EL731-23-00 is an earth-leakage relay with a supply voltage dc of 24 and offers communications via EtherNet-IP™. | |
| EL731-23-10 is an earth-leakage relay with a supply voltage dc of 24 and offers communications via EtherNet-IP™. | |
| EL731-24-00 is an earth-leakage relay with a supply voltage dc of 24 and offers communications via Modbus®TCP. | |
| EL731-24-10 is an earth-leakage relay with a supply voltage dc of 24 and offers communications via Modbus®TCP. | |
| Littelfuse Shock-Block provides UL 943 Class A GFCI protection to cast, crew and production equipment from electrical hazards. Wet conditions, moisture or just worn cable insulation can cause ground faults... | |
| Metal NEMA-3R electrical box with lenses for viewing the single-phase pump protection relay status lights | |
| NGR1036 is a neutral-grounding resistor system with a line-to-line voltage of 480 and let-through current of 5 (A). | |
| NGR1038 is a neutral-grounding resistor system with a line-to-line voltage of 600 and let-through current of 5 (A). | |
| NGR1041 is a neutral-grounding resistor system with a line-to-line voltage of 480 and let-through current of 2 (A). | |
| NGR1045 is a neutral-grounding resistor system with a line-to-line voltage of 600 and let-through current of 5 (A). | |
| NGR1050 is a neutral-grounding resistor system with a line-to-line voltage of 480 and let-through current of 2 (A). | |
| NGR1051 is a neutral-grounding resistor system with a line-to-line voltage of 480 and let-through current of 5 (A). | |
| NGR1052 is a neutral-grounding resistor system with a line-to-line voltage of 600 and let-through current of 2 (A). | |
| NGR1053 is a neutral-grounding resistor system with a line-to-line voltage of 600 and let-through current of 2 (A). | |
| NGR1066 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 5 (A). | |
| NGR1067 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 5 (A). | |
| NGR1068 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 5 (A). | |
| NGR1069 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 5 (A). | |
| NGR1070 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 10 (A). | |
| NGR1071 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 10 (A). | |
| NGR1072 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 10 (A). | |
| NGR1073 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 10 (A). | |
| NGR1074 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 15 (A). | |
| NGR1075 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 15 (A). | |
| NGR1076 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 15 (A). | |
| NGR1077 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 15 (A). | |
| NGR1078 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 25 (A). | |
| NGR1079 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 25 (A). | |
| NGR1080 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 25 (A). | |
| NGR1081 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 25 (A). | |
| NGRM-ENC Series – Enclosed Neutral-Grounding-Re sistor Monitor | |
| NGRUS314 is a neutral-grounding resistor system with a line-to-line voltage of 480 and let-through current of 2 (A). | |
| NGRUS315 is a neutral-grounding resistor system with a line-to-line voltage of 480 and let-through current of 2 (A). | |
| NGRUS316 is a neutral-grounding resistor system with a line-to-line voltage of 480 and let-through current of 5 (A). | |
| NGRUS317 is a neutral-grounding resistor system with a line-to-line voltage of 480 and let-through current of 5 (A). | |
| NGRUS318 is a neutral-grounding resistor system with a line-to-line voltage of 600 and let-through current of 2 (A). | |
| NGRUS319 is a neutral-grounding resistor system with a line-to-line voltage of 600 and let-through current of 2 (A). | |
| NGRUS320 is a neutral-grounding resistor system with a line-to-line voltage of 600 and let-through current of 5 (A). | |
| NGRUS321 is a neutral-grounding resistor system with a line-to-line voltage of 600 and let-through current of 5 (A). | |
| NGRUS322 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 5 (A). | |
| NGRUS323 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 5 (A). | |
| NGRUS324 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 5 (A). | |
| NGRUS325 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 5 (A). | |
| NGRUS326 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 10 (A). | |
| NGRUS327 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 10 (A). | |
| NGRUS328 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 10 (A). | |
| NGRUS329 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 10 (A). | |
| NGRUS330 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 15 (A). | |
| NGRUS331 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 15 (A). | |
| NGRUS332 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 15 (A). | |
| NGRUS333 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 15 (A). | |
| NGRUS334 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 25 (A). | |
| NGRUS335 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 25 (A). | |
| NGRUS336 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 25 (A). | |
| NGRUS337 is a neutral-grounding resistor system with a line-to-line voltage of 4160 and let-through current of 25 (A). | |
| Obsolete: 08/11/2020 The FlexMod electronic voltage sensing relay & timer monitors both battery voltage and ignition status. shutting down non-critical loads when the cutoff voltage is reached. or at the... | |
| PGA-LS10 is an arc-detection, optical sensor accessory used with the PGR-8800 relay to collect light over a wide angle and with high sensitivity. This sensor weighs 0.6 kg. | |
| PGR-3100 is a ground-fault indication system with a supply voltage ac of 600 (none for dc) and measures 88.9x108x54 mm. | |
| PGR-3200 is a ground-fault and insulation monitor with a supply voltage ac of 240. | |
| PGR-3200-120 is a ground-fault and insulation monitor with a supply voltage ac of 120. | |
| PGR-4300-12 is a generator ground-fault relay with a supply voltage dc of 12. | |
| PGR-4300-120 is a generator ground-fault relay with a supply voltage ac of 120. | |
| PGR-4300-24 is a generator ground-fault relay with a supply voltage dc of 24. | |
| PGR-4700-120 is a sensitive ground-fault relay with a supply voltage ac of 120. | |
| PGR-4700-24 is a sensitive ground-fault relay with a supply voltage ac and dc of 24. | |
| PGR-4700-240 is a sensitive ground-fault relay with a supply voltage ac of 240. | |
| PGR-6100-120 is a ground-fault and insulation relay with a supply voltage of 120 V ac and 24 V dc. | |
| PGR-6100-240 is a ground-fault and insulation relay with a supply voltage of 240 V ac. | |
| PGR-6101-120 is a ground-fault and insulation monitor with a supply voltage ac of 120. | |
| PGR-8800-00 is an arc-flash relay with a supply voltage ac of 120–240 and a supply voltage dc of 12–48, 120–240. | |
| PGR-8800-00-CC is an arc-flash relay with a supply voltage ac of 120–240 and a supply voltage dc of 12–48, 120–240. This unit is conformally coated. | |
| Power Semiconductors & Control ICs - Solid State Relays - OptoMOS Relays - Normally Open Relays - Series: 1-Form-A: With Transient Voltage Protection - CPC1317P | |
| Relay Software | |
| Relays, Contactors & Transformers - Protection Relays - Feeder Protection - Series: PGR-7200 - PGR-7200-00-00-FPU | |
| Relays, Contactors & Transformers - Protection Relays - Feeder Protection - Series: PGR-7200 - PGR-7200-00-00 | |
| Relays, Contactors & Transformers - Protection Relays - Feeder Protection - Series: PGR-7200 - PGR-7200-01-00-FPU | |
| Relays, Contactors & Transformers - Protection Relays - Feeder Protection - Series: PGR-7200 - PGR-7200-01-00 | |
| Relays, Contactors & Transformers - Protection Relays - Feeder Protection - Series: PGR-7200 - PGR-7200-02-00-FPU | |
| Relays, Contactors & Transformers - Protection Relays - Feeder Protection - Series: PGR-7200 - PGR-7200-02-00 | |
| Relays, Contactors & Transformers - Protection Relays - Feeder Protection - Series: PGR-7200 - PGR-7200-04-00-FPU | |
| Relays, Contactors & Transformers - Protection Relays - Feeder Protection - Series: PGR-7200 - PGR-7200-04-00 | |
| Relays, Contactors & Transformers - Protection Relays - Motor & Pump Protection - Series: PGR-6130 - PGR-6131-120 | |
| Relays, Contactors & Transformers - Protection Relays - Motor & Pump Protection - Series: PGR-6130 - PGR-6131-240 | |
| Relays, Contactors & Transformers - Protection Relays - Motor & Pump Protection - Series: PGR-6130 - PGR-6131-24 | |
| Relays, Contactors & Transformers - Protection Relays - Motor & Pump Protection - Series: PGR-6130 - PGR-6132-120 | |
| Relays, Contactors & Transformers - Protection Relays - Motor & Pump Protection - Series: PGR-6130 - PGR-6132-240 | |
| Relays, Contactors & Transformers - Protection Relays - Motor & Pump Protection - Series: PGR-6130 - PGR-6132-24 | |
| Relays, Contactors & Transformers - Protection Relays - Motor & Pump Protection - Series: PGR-6130 - PGR-6133-120 | |
| Relays, Contactors & Transformers - Protection Relays - Motor & Pump Protection - Series: PGR-6130 - PGR-6133-240 | |
| Relays, Contactors & Transformers - Protection Relays - Motor & Pump Protection - Series: PGR-6130 - PGR-6133-24 | |
| SB5000 Industrial Shock Block® GFCI / SPGFCI / EGFPD | |
| Specialized OptoMOS® single-pole, normally open Solid State Relays (1-Form-A) with an integrated active current limit and thermal shutdown feature that can replace electromechanical relays while enhancing the robustness of wireline... | |
| Steel enclosure for protecting a Littelfuse RM1000 remote communications monitor from adverse affects of weather and vandalism, while allowing normal communications connections to the RM1000 unit. Its superior design protects... | |
| The 102A is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-400VAC, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage setpoint and the voltage monitor... | |
| The 102A is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-600VAC, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage setpoint and the voltage monitor... | |
| The 111-Insider-P provides single-phase protection for submersible pumps with an input voltage of 115 V ac and input load range from ⅓–½ hp. Its output load rating is ½ hp... | |
| The 111P is a single-phase pump monitor with an input voltage value of 115 V ac and an input load range of ⅓–1 hp. The dimensions of this unit are... | |
| The 111P-ENCL is an enclosed single-phase pump monitor with an input voltage value of 115 V ac and an input load range of ⅓–1 hp. The dimensions of this unit... | |
| The 201-xxx-DPDT is an 11-pin octal base plug-in voltage monitor designed to protect 3-phase motors regardless of size. The 201-100-DPDT is used on 95-120VAC, 50/60Hz motors and the 201-200-DPDT is... | |
| The 201-xxx-SP is an 8-pin octal-base, plug-in voltage monitor designed to protect single-phase motors regardless of size. The 201-100-SP is used on 95-120VAC, 50/60Hz motors to prevent damage caused by... | |
| The 201-xxx-SP-DPDT is an 8-pin octal-base, plug-in voltage monitor designed to protect single-phase motors regardless of size. The 201-100-SP-DPDT is used on 95-120VAC, 50/60Hz motors to prevent damage caused by... | |
| The 201A is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-480VAC, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage setpoint and the voltage monitor... | |
| The 201A-AU is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-480VAC, 50/60Hz motors regardless of size. Has user adjustable 1-30 second trip delay, manual or 1-500 second restart delay,... | |
| The 202 series is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-600VAC, 50/60Hz motors regardless of size. The 202-RP monitors the phase rotation of 3-phase systems and trips on... | |
| The 202-200-SP voltage monitor is designed to protect single-phase motors regardless of size. It can be used with 190V-240VAC, 50/60Hz motors to prevent damage caused by incoming power problems. A... | |
| The 231-Insider-P provides single-phase protection for submersible pumps with an input voltage of 230 V ac and input load range from ⅓–1 hp. Its output load rating is 1 hp... | |
| The 233P pump monitor protects single-phase pumps with an input voltage value of 230 V ac, an input load range of ⅓–3 hp, and an output load rating of 3... | |
| The 233P-1.5 pump monitor protects single-phase pumps with an input voltage value of 230 V ac, an input load range of ⅓–1.5 hp, and an output load rating of 1.5... | |
| The 233P-ENCL is an enclosed single-phase pump monitor with an input voltage value of 230 V ac, an input load range of ⅓–3 hp, and an output load rating of... | |
| The 233P1.5-ENCL is an enclosed single-phase pump monitor with an input voltage value of 230 V ac, an input load range of ⅓–1.5 hp, and an output load rating of... | |
| The 235P pump monitor protects single-phase pumps with an input voltage value of 230 V ac, an input load range of 5–15 hp (external current transformer required), and the following... | |
| The 235P-ENCL is an enclosed single-phase pump monitor with an input voltage value of 230 V ac, an input load range of 5–15 hp (external current transformer required), and the... | |
| The 250A is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-480VAC, 50*/60Hz motors regardless of size from low and high voltage, unbalance/single-pha se, and reverse-phase. The product provides a... | |
| The 250A is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-480VAC, 50/60Hz motors regardless of size from low and high voltage, unbalance/single-pha se, and reverse-phase. The product provides a... | |
| The 350 is a heavy-duty voltage monitor. This product should be used when high current relays or dual contacts are required, or 480V controls are used. Since the 350 uses... | |
| The 355 is a 3-phase voltage monitor with adjustable trip and restart delay, adjustable voltage unbalance and multiple diagnostic lights. It is perfect for heavy-duty applications that need both protection... | |
| The 455 Series are 3-phase voltage monitors that combine load and line side monitoring to offer complete protection. Monitoring the load side will alert the user of contactor failure or... | |
| The 460 is a 3-phase voltage monitor that protects 190-480VAC or 475-600V, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage set point and the voltage... | |
| The 460-100-SP is used on 95-120VAC, 50*/60Hz single-phase motors and the 190-240VAC, 50*/60Hz single-phase motors to protect them from damaging high and low voltage conditions. An adjustment knob allows the... | |
| The 50R single-phase voltage monitor has a voltage-sensing circuit which constantly monitors the single-phase power for a low voltage condition. Single-phase motors on fans, compressors, air conditioners, heat pumps, well... | |
| The 601-CS-D-P1 3-phase power monitor is a fully programmable electronic power monitor designed to monitor 3-phase systems. The 601-CS-D-P1 has a single relay that can be configured as a general... | |
| The 777-575-HRG-P2 three-phase current and voltage monitor provides motor protection with input voltage from 500–600 V ac and motor full load ampere range of 2–20 A (looped conductors required); 20–90... | |
| The 777-575-KW/HP-P2 three-phase current and voltage monitor provides protection with input voltage from 500–600 V ac and motor full load ampere range as follows: 2–20 A (looped conductors required); 20–90... | |
| The 777-575-LR-P2 three-phase current and voltage monitor provides motor protection with input voltage from 500–600 V ac and motor full load ampere range of 1–9 A (direct); 10–800 A (external... | |
| The 777-575-P2 three-phase current and voltage monitor provides motor protection with input voltage from 500–600 V ac and motor full load ampere range as follows: 2–20 A (looped conductors required); | |
| The 777-AccuPower three-phase motor and pump relay provides protection with input voltage from 190–480 V ac and full load ampere range as follows: 2–25 A: 3-phase (looped conductors required); 25–90... | |
| The 777-FT three-phase current and voltage monitor provides motor protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 2–25 A: 3-phase (looped conductors... | |
| The 777-HRG-P2 three-phase current and voltage monitor provides motor protection with input voltage from 200–480 V ac and motor full load ampere range of 2–20 A (looped conductors required); 20–90... | |
| The 777-HVR-KW/HP-P2 three-phase current and voltage monitor provides protection with input voltage from 340–480 V ac and motor full load ampere range as follows: 2–20 A (looped conductors required); 20–90... | |
| The 777-HVR-LR-P2 three-phase current and voltage monitor provides motor protection with input voltage from 340–480 V ac and motor full load ampere range of 1–9 A (direct); 10–800 A (external... | |
| The 777-HVR-P2 three-phase current and voltage monitor provides motor protection with input voltage from 340–480 V ac and full load ampere range as follows: 2–20 A (looped conductors required); 20–90... | |
| The 777-HVR-SP single-phase relay provides motor protection with input voltage from 340–480 V ac and motor full load ampere range as follows: 2–25 A (looped conductors required); 26–90 A (direct); | |
| The 777-KW/HP-P2 three-phase current and voltage monitor provides protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 2–20 A (looped conductors required); 20–90... | |
| The 777-LR-P2 three-phase current and voltage monitor provides motor protection with input voltage from 200–480 V ac and motor full load ampere range of 1–9 A (direct); 10–800 A (external... | |
| The 777-LR-TS three-phase current and voltage monitor provides motor protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 1–4.5 A: 3-phase (looped conductors... | |
| The 777-MV-P2 three-phase current and voltage monitor provides motor protection with input voltage from 100–240 V ac and motor full load ampere range of 10–800 A (external CTs required). | |
| The 777-P2 three-phase current and voltage monitor provides motor protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 2–20 A (looped conductors required):... | |
| The 777-TS three-phase current and voltage monitor provides motor protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 2–25 A: 3-phase (looped conductors... | |
| The 777VA-02 three-phase current and voltage monitor provides motor protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 2–25 A: (looped conductors required); | |
| The 777VA-03 three-phase current and voltage monitor provides motor protection with input voltage from 200–480 V ac and motor full load ampere range as follows: 2–25 A: (looped conductors required); | |
| The 77C single-phase relay provides motor protection with input voltage from 100–240 V ac and motor full load ampere range as follows: 2–25 A (looped conductors required); 26–90 A (direct); | |
| The 77C-LR single-phase relay provides motor protection with input voltage from 100–240 V ac and motor full load ampere range as follows: 1.0–2.5 A (looped conductors required); 2.0–9.0 A (direct). | |
| The AF0025 series arc-flash relay is a cost-effective and OEM-focused solution that provides innovative arc-flash protection in a compact package. The relay significantly reduces arc-fault damage in ac and dc... | |
| The DLMU Series is a universal voltage, 3-phase voltage monitor. It continuously measures the voltage of each of the three phases with microcontroller accuracy and compares the value to preset... | |
| The FlexMod Electronic Voltage Sensing Relay & Timer monitors both battery voltage and ignition status, shutting down non-critical loads when the cutoff voltage is reached, or at the set time... | |
| The FPS (Feeder Protection System) is a feeder-protection relay that provides current, voltage, and temperature protection for feeder applications. It offers integrated breaker or contactor control, data logging, and a... | |
| The FPU-32 is a feeder-protection relay that provides integrated protection, metering, and data-logging functions.Two set-point groups can be used for:• Maintenance setting to reduce fl ash hazard• Two different loads• | |
| The HLMU Series is a universal voltage, encapsulated, 3-phase voltage monitor. It continuously measures the voltage of each of the three phases with microcontroller accuracy and compares the value to... | |
| The HLV Series is a single-phase undervoltage monitor designed to protect sensitive equipment from brownout or undervoltage conditions. Time delays are included to prevent nuisance tripping and short cycling. The... | |
| The Informer is a hand-held diagnostic tool designed for use with single-phase models equipped with infrared LED transmitters (111-Insider-P; 231-Insider-P; 232-Insider; 111P; 233P; 233P-1.5; 234-P and 235P). The Informer uses... | |
| The KRDB Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its microcontroller timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock,... | |
| The KRDM Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its solid-state timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock,... | |
| The KRDR Series is a compact time-delay relay measuring only 2 in. (50.8 mm) square. Its solid-state timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration,... | |
| The KVM Series is a single-phase undervoltage monitor designed to protect sensitive equipment against brownout undervoltage conditions. The compact design and encapsulated construction make the KVM an excellent choice for... | |
| The Model 601 is a fully-programmable voltage monitor designed to protect 3-phase motors. It can be used as a stand-alone product or networked with an RM-1000, RM-2000, PLC, computer or... | |
| The MP8000 is an advanced motor protection electronic overload relay that is fully programmable via Bluetooth® using an iPhone or Android smartphone/tablet with the Littelfuse app. It has an input... | |
| The MP8000 series motor protection relay is designed to protect three-phase or single-phase motors with operating voltages of 90-690 V ac (use of external potential transformers can extend upper voltage... | |
| The MPS-CTU-01-00 is a motor protection system with a supply voltage between 65–265 V ac and 80–275 V dc. This unit monitors voltage, current, and temperature with communication via RS/TIA-485. | |
| The MPS-CTU-02-00 is a motor protection system with a supply voltage between 65–265 V ac and 80–275 V dc. This unit monitors voltage, current, and temperature with communication via RS/TIA-485... | |
| The MPS-CTU-03-00 is a motor protection system with a supply voltage between 65–265 V ac and 80–275 V dc. This unit monitors voltage, current, and temperature with communication via RS/TIA-485... | |
| The MPS-CTU-04-00 is a motor protection system with a supply voltage between 65–265 V ac and 80–275 V dc. This unit monitors voltage, current, and temperature with communication via RS/TIA-485... | |
| The MPS-DIF-01-00 module adds differential protection to the MPS and MPU-32. It is compatible with 3-CT core balance and 6-CT summation current transformer connections (optional). | |
| The MPS-OPI-01-00 (MPS-OPI) is the recommended 4 x 20 vacuum-fluorescent operator interface display for the MPS Motor Protection System. | |
| The MPU-32-00-00 is a motor protection unit with a supply voltage between 65–265 V ac and 80–275 V dc. This unit provides current and temperature-based protection with communication via RS/TIA-232. | |
| The MPU-32-00-01 is a motor protection unit with a supply voltage between 65–265 V ac and 80–275 V dc. This unit provides current and temperature-based protection with communication via RS/TIA-232. | |
| The MPU-32-01-00 is a motor protection unit with a supply voltage between 65–265 V ac and 80–275 V dc. This unit provides current and temperature-based protection with communication via RS/TIA-232-RS/TIA-48... | |
| The MPU-32-01-01 is a motor protection unit with a supply voltage between 65–265 V ac and 80–275 V dc. This unit provides current and temperature-based protection with communication via RS/TIA-232-RS/TIA-48... | |
| The MPU-32-02-00 is a motor protection unit with a supply voltage between 65–265 V ac and 80–275 V dc. This unit provides current and temperature-based protection with communication via RS/TIA-232... | |
| The MPU-32-02-01 is a motor protection unit with a supply voltage between 65–265 V ac and 80–275 V dc. This unit provides current and temperature-based protection with communication via RS/TIA-232... | |
| The MPU-32-04-00 is a motor protection unit with a supply voltage between 65–265 V ac and 80–275 V dc. This unit provides current and temperature-based protection with communication via RS/TIA-232... | |
| The MPU-32-04-01 is a motor protection unit with a supply voltage between 65–265 V ac and 80–275 V dc. This unit provides current and temperature-based protection with communication via RS/TIA-232... | |
| The MSM replaces bi-metal type timing with reliable solid-state circuitry. There are no moving parts to arc or wear. It is a cost effective solution for OEM designers. It is... | |
| The OptoMOS® line of solid state relays uses discrete semiconductor components and the patented OptoMOS® architecture to deliver fast, reliable, bounce-free switching in a compact design. From one of the... | |
| The ORM Series features open PC board construction for reduced cost. It has isolated, 10A, DPDT relay contacts and all connections are 0.25 in (6.35 mm) male quick connect terminals. | |
| The PLM Series is a 3-phase voltage monitor that continuously monitors each of the three phases. Monitors both delta and wye systems and no connection to neutral is required. The... | |
| The PLMU11 continuously measures the voltage of each of the three phases to provide protection for 3-phase motors and sensitive loads. Its microcontroller senses under and overvoltage, voltage unbalance, phase... | |
| The PLR Series provides a cost effective means of preventing 3-phase motor startup during adverse voltage conditions. Proper A-B-C sequence must occur in order for the PLR’s output contacts to... | |
| The PLS Series is a low cost phase sensitive control that provides an isolated contact closure when the proper A-B-C phase sequence is applied. Protects sensitive 3-phase equipment and equipment... | |
| The PumpSaver® Plus Model 234-P protects single-phase pumps with an input voltage value of 230 V ac, an input load range of ⅓–3 hp, and an output load rating of... | |
| The RCD300M2 residual current relay is designed to provide sensitive ground fault protection without the problems associated with high-sensitivity nuisance tripping. It operates continuously and has the unique feature of... | |
| The single-phase 232-Insider PumpSaver® fits inside ⅓, ½, ¾, and 1 hp, 230 V Grundfos control boxes. Its input voltage is 230 V ac with an input load range of... |
| Next >> |