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Protection Relays

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Protection Relays
Protection Relays
Protection relays are electronic components designed to prevent unnecessary trips, isolate faults and protect motors, breakers, and other equipment.

Modern protective relays are microprocessor-based, and use inputs and settings to intelligently compare measurements to setpoints and produce a desired output. Inputs can include variables like current, voltage, resistance and temperature. If any of those values exceed a prescribed setpoint, the relay can trigger an output like an alarm, an indicating light, a network communication, and even turn another device on or off.

Because modern protection relays use digital technology to operate, they can produce quick, reliable, repeatable outputs far more frequently over a longer lifetime. They also provide better accuracy to eliminate nuisance trips, reduced maintenance needs to improve uptime, and better efficiency to cut costs and save panel space.

1SVR730 Series Image
  • 24-240VAC/DC
  • Screw terminals
  • Over or under voltage monitoring
CM-ESS.1S Voltage monitoring relay 1c/o, B-C=3-600VRMS, 24-240VAC/DC
1SVR750 Series Image
  • Screw terminals
  • 200ms start up delay
  • Measuring range; 3x450-720VAC
  • 0 to 30 sec tripping delay, on or off
CM-MPN.62S Three-phase monitoring relay 2c/o, 0,0.1-30s, L1-L2-L3=3x450-720VAC
  • Number of poles; 3
  • Main circuit 600VAC
  • Protection degree is IP20
  • Rated frequency is 50/60Hz
The Universal Motor Controller UMC100-FBP is a motor protection and control device for 3-phase motors. It provides electronic motor protection with through-the-hole current transformers, 3 relay outputs, one 24V DC output, 6 digital inputs for controlling and an optional LCD panel for parametrization and operation. Pre-programmed starter functions simplify the engineering process. The UMC100-FBP can be expanded with different IO modules.
1SAJ590 Series Image
  • Protection Relay
  • Net Weight: 1.76 oz
  • Gross Weight: 1.769 oz
  • Mounting Type: Single Mounting
  • 3 LEDs
An LCD protection relay/operating panel with LEDs. Compact with three LEDs and has six function keys.
1SAR700 Series Image
  • 24-240VAC/DC
  • Screw terminals
  • 3 sensor circuits
  • Over temperature/ under temperature
Temperature monitoring relay C513-W, width 45mm, digital adjustable, 2 thresholds, exceeding/parces below, window monitoring, A1-A2=24-240V AC / DC, 1 c/o, 1 c/o, 1 n/o
1SVR430 Series Image
  • Screw terminals
  • 500ms start up delay
  • measuring range; 3x200-500VAC
Phase sequence relay CM-PFS, width 22.5mm, measuring range L1-L2-L3=200-500VAC 50/60Hz, powered by measuring range, 2 c/o (closed circuit principle)
1SVR450 Series Image
  • 110 to 130VAC
  • 05 to 30 sec ON-delay
The CM-KRN relay is from the CM contact protection relay range. This protection relay operates with a rated control supply voltage of 110-130 V AC, has a 2 c/o (SPDT) output with contacts rated at 250 V / 4 A and works according to the open-circuit principle. It acts as two-position switch and protects and reduces load from sensitive control contacts. It can be used with or without latching function. The bounce time of control contacts can be bypassed by the adjustable response delay time (0.05-30 s). A sealable transparent cover for protection against unauthorized changes is available as accessory.
1SVR5508 Series Image
  • Screw terminals
  • 500ms start up delay
  • 500ms tripping delay
  • Measuring range; 3x208-440VAC
Phase sequence relay CM-PFE, width 22.5mm, measuring range L1-L2-L3=208-440VAC, powered by measuring circuit, 1 c/o (closed circuit principle)
1SVR630 Series Image
  • 24-240VAC/DC
  • Screw terminals
  • Short circuit detection
  • Over temperature/under temperature
CM-TCS.13 Temperature monitoring relay Temp.-range 0...+200C, 24-240VAC/DC
1SVR650 Series Image
  • 24-240VAC/DC
  • Screw terminals
  • Measuring range 1-200kOhm
CM-IWN.1 Insulation monitoring relay 2c/o, 1-100kOhm, 2-200kOhm, 24-240VAC/DC
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