PTC-relays Type MSF220VL
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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:
- Fan-control - alarm - trip (winding) - trip (core)
- Alarm - trip (winding) - trip (core) - alarm (fault)
- Fan-control - alarm - trip (winding) - alarm (fault)
- 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
- DEWA-standard for Dubai
- Accessory: Front mounting kit type ER4
| Applications: | Wind energy plants, Protection of transformers |
|---|---|
| Approval: | UL/CSA, EU / UKCA-Declaration of Conformity |
| Design: | Mount in switchgear cabinet, Mount in circuit breaker box |
| Extras: | Thermistor-Relay, 3 or more sensor inputs, Reclosing lock |
| Input/ Measured parameter: | PTC |
| Outputs: | Outputs/Relays |
| Product group: | Temperature Measurement |
| Supply voltage: | AC/DC 24-240 V |
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Accessories
You found a device in that meets your requirements and you want to install it in a control panel or in the door of a control cabinet?With the installation frame of the ER series, this is possible for all ZIEHL devices in housings V4, V6 and V8 (width 70/105/140 mm).Enclosed by a high-quality frame made of anodized aluminum, all displays can be read outside the control cabinet. Switches, buttons and joystick can be operated.
