Automatic Reset Protective Relays and Monitoring Relays Datasheets

CM-MSS Series Thermistor Motor Protection Relays
from ABB Electrification Products

The thermistor motor protection relays of the CM-MSx.xx range monitor the winding temperature of motors which have PTC temperature sensors installed. These sensors are incorporated in the motor windings thus measuring the motor heat directly. This direct temperature measurement enables the... [See More]

  • Features: Automatic Reset; Visual Indicator
  • Approvals: RoHS
  • Supply Voltage Range: 24 to 240
  • Operating Temp: -13 to 140
Protection & Control -- 239 Motor Protection Relay
from GE Digital Energy

The 239 relay is designed to fully protect three phase AC motors against conditions which can cause damage. In addition to motor protection, the. relay has features that can protect associated mechanical equipment, give an alarm before damage results from a process malfunction, diagnose problems. [See More]

  • Features: Automatic Reset; Latching; Programmable Time Delay; Visual Indicator
  • Current Sensitive Relay: Undercurrent
  • Power (Phase) Sensing: Ground (Earth) Fault
  • Protective Functions: Time Delay
Thermistor Control Relay -- 45200
from Hoyt Electrical Instrument Works, Inc.

THERMISTOR RELAYS Are Calibrated And Operate In Accordance With The Industry Standard DIN 44081. The Three Phase Model 45PTR Also Monitors For Phase Loss, Sequence And Under Voltage Conditions. [See More]

  • Features: Automatic Reset; Latching; Visual Indicator
  • Voltage Sensing Range: 25 to 250
  • Current Sensing Range: 6 to 10
  • Supply Voltage Range: 24 to 230
Current Monitor Relay - CMP Series -- CMKP01A22
from Macromatic Industrial Controls, Inc.

The CM Series is used to detect either an overcurrent or undercurrent condition. The pick-up current setting is user-adjustable within one of three ranges as shown in the Product Selection Table below. An external current transformer can be used to extend the range beyond 10 amperes. Choose between... [See More]

  • Features: Automatic Reset; Visual Indicator
  • Protective Functions: Time Delay
  • Current Sensitive Relay: Over-Current Protection; Undercurrent
  • Current Sensing Range: 0.1000 to 1
3-Phase Monitor -- Model 158B
from Time Mark Corporation

The Model 158 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 158 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a solid-state voltage and phase-angle sensing circuit, driving an... [See More]

  • Features: Automatic Reset; Visual Indicator
  • Power (Phase) Sensing: Phase Failure (Loss); Reversal
  • Voltage Sensitive Relay: Undervoltage
  • Protective Functions: Time Delay (optional feature); Synchronous Check (Paralleling)