LINETRAXX® VMD420
- Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 0…500 V
- Various monitoring functions selectable < U, > U, < f, > f
- Asymmetry, phase failure and phase sequence monitoring
- Adjustable start-up delay, response delay and delay on release
The multi-functional VMD420 series voltage relay is designed to monitor the frequency, undervoltage and overvoltage and the voltage between two threshold values in 3(N)AC systems. The voltages are measured as r.m.s. values. The currently measured value is continuously shown on the LC display. The measured value required to trigger the alarm relay is stored. Due to adjustable response times, installation-specific characteristics, such as device-specific start-up procedures, short-time voltage fluctuations, etc. can be considered. The devices require an external supply voltage.
- Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 0…500 V
- Various monitoring functions selectable < U, > U, < f, > f
- Asymmetry, phase failure and phase sequence monitoring
- Adjustable start-up delay, response delay and delay on release
The multi-functional VMD420 series voltage relay is designed to monitor the frequency, undervoltage and overvoltage and the voltage between two threshold values in 3(N)AC systems. The voltages are measured as r.m.s. values. The currently measured value is continuously shown on the LC display. The measured value required to trigger the alarm relay is stored. Due to adjustable response times, installation-specific characteristics, such as device-specific start-up procedures, short-time voltage fluctuations, etc. can be considered. The devices require an external supply voltage.
Features
- Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 0…500 V
- Asymmetry, phase failure and phase sequence monitoring
- Different monitoring functions selectable < U, > U, < f, > f
- Start-up delay, response delay, delay on release
- Adjustable switching hysteresis
- r.m.s. value measurement (AC)
- Digital measured value display via multi-functional LC display
- Preset function (automatic assignment of basic parameters)
- LEDs: Power On, Alarm 1, Alarm 2
- Measured value memory for operating value
- Continuous self monitoring
- Internal test/reset button
- Two separate alarm relays (one changeover contact each)
- N/C or N/O operation and fault memory behaviour selectable
- Password protection for device setting
- Sealable transparent cover
- Two-module enclosure (36 mm)
- Indication of the system frequency
- RoHS-compliant
Applications
- Monitoring of voltage-sensitive machines and electrical installations
- Switching on and switching off at a certain voltage level
- Monitoring of stand-by and emergency supply systems
- Supply voltage monitoring of portable loads
- Protection of three-phase motors against phase failure and
- Transformer protection, asymmetrical load can be recognized
LINETRAXX® VMD420 Variant(s)
| Type | Supply voltage US* | Nominal system voltage Un* | Art. No.** |
|---|---|---|---|
| VMD420-D-1 | AC 16…72 V / DC 9,6…94 V, 15…460 Hz | 3(N)AC 0…500 V / 288 V 15…460 Hz | B73010005 B93010005 |
| VMD420-D-2 | AC/DC 70…300 V, 15…460 Hz | 3(N)AC 0…500 V / 288 V, 15…460 Hz | B73010006 B93010006 |
* absolute values
**(B7… = push-wire terminal / B9… = screw-type terminal)
Optional Accessories for LINETRAXX® VMD420
| Type | Art. No. |
|---|---|
| Mounting clip for screw mounting (one piece per device) | B98060008 |
| Mounting frame XM420 | B990994 |
Downloads for LINETRAXX® VMD420
| Category | Name | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| Certificates | TÜV NORD - isoHV42x, AGH42x, isoHV52x, isoRW42x und VMx420 | 431.9 KB | DE | 2023/01/12 14:46:3012.01.2023 14:46:30 | |
| Certificates | TÜV NORD - isoHV42x, AGH42x, isoHV52x, isoRW42x and VMx420 | 411.7 KB | EN | 2023/01/12 14:46:3512.01.2023 14:46:35 | |
| Declarations of Conformity | UKCA - VMx42x | 141.7 KB | 2022/12/20 06:00:2220.12.2022 06:00:22 | ||
| CE Declarations of Conformity | VMx42x | 93.7 KB | 2022/11/04 09:31:2004.11.2022 09:31:20 | ||
| Manuals | VMD420 | 5.7 MB | EN | 2022/06/09 10:48:1209.06.2022 10:48:12 | D00137 |
| Datasheets | VMD420 | 372.2 KB | EN | 2022/08/10 05:51:4410.08.2022 05:51:44 | D00137 |
| Quickstarts | VMD420 | 998.0 KB | EN | 2022/06/09 10:52:1309.06.2022 10:52:13 | D00137 |
| Datasheets | XM420 interface options | 223.5 KB | EN | 2019/05/13 10:31:3613.05.2019 10:31:36 | D00051 |
| Technical Information | Changed variants of relays from goldplated to silver-plated contacts | 166.3 KB | EN | 2022/06/27 09:03:0827.06.2022 09:03:08 |