PTC-relays Type MSF220VL

PTC-Resistor-Relay for dry transformers, 4 PTC-circuits, intelligent fan control, monitoring of core temperature

PTC-relays Type MSF220VL

Part number

AC/DC 24 - 240 V

Approvals


Product description

 

The MSF220VL is particularly suitable for monitoring of temperatures at dry transformers, when also the temperature of the core shall be measured. Monitoring of core temperature is especially required in rectifier transformers because of harmonics causing heat in the core.

An intelligent control prolongs automatically the runtime of a cooling-fan, depending on the load of the transformer. Each PTC-circuit is monitored for break and short circuit. This reduces probability of false alarms. Relays in operating-current mode prevent from a trip-signal when switching on supply voltage.

The device can be adapted to different applications with 4 programs:

  1. Fan-control - alarm - trip (winding) - trip (core)
  2. Alarm - trip (winding) - trip (core) - alarm (fault)
  3. Fan-control - alarm - trip (winding) - alarm (fault)
  4. Fan-control with hysteresis T1/T2 - alarm – trip (winding) - time relay

Overview of functions

  • 4 inputs for PTC
  • Intelligent control of fan
  • Automatic fan-test 1x / week
  • electronic reclosing lock for alarms (trip) connectable
  • Monitoring of sensors
  • Test-button
  • Simple testing with disconnectable monitoring of break and short circuit (for 10 minutes)
  • cURus
  • LEDs for alarms, states of relays and sensors
  • Housing for mounting on DIN-Rail or wall-mount(option)
  • Mounting height 55 mm
  • Universal supply voltage AC/DC 24-240 V

 

Technical data

Rated supply voltage Us

.......

AC/DC 24 - 240 V ± 15 %, < 3 VA

 

Connectable PTC resistors

.......

4 x 1...6 PTC according to DIN 44081 or 44082

 

Switching point

.......

< 4000 Ω

 

Output relay

.......

4 x 1  change-over-contact (co)

 

Type of contact

.......

Type 2 (see general technical information)

 

Test conditions

.......

see general technical information

 

Rated ambient temperature

.......

-20...+60 °C

 

Dimensions h x w x d

.......

Design V4: 90 x 70 x 58 [mm]

 

Attachment

.......

on 35 mm DIN rail according to EN 60 715 or screws M4

 

Protection Housing/Terminals

.......

IP30/IP20

 

Weight

.......

approx. 250 g