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70.62.8.400.0000T Finder Monitoring relay 3 phase AC 208/480V
Finder 70.62.8.400.0000T is a railway-version three-phase monitoring relay for phase-loss and phase-sequence detection across 208–480 V AC supplies, featuring two 8 A changeover contacts, a 0.5-second actuation delay, screw terminals and DIN-rail mounting.
£86.29
Why Choose the Finder 70.62.8.400.0000T Three-Phase Monitoring Relay?
The Finder 70.62.8.400.0000T is an electronic three-phase voltage monitoring relay designed to detect phase loss and incorrect phase sequence in industrial and railway electrical systems. Part of the Finder 70 Series, this specialised version provides reliable supply supervision for applications requiring dependable monitoring of three-phase electrical networks.
Operating across a 3 × 208–480 V AC monitoring range, the Finder 70.62.8.400.0000T monitors the presence and sequence of the three supply phases. It features two changeover output contacts (DPDT / 2 CO), each rated at 8 A at 250 V AC, providing flexible connections for fault signalling, contactor control and industrial automation interfaces.
The T-version is intended for railway industry applications and is specified against EN 50155, EN 61373 and EN 45545-2 requirements. Its 0.5 s switching delay, screw terminals, compact 22.5 mm width and DIN-rail mounting design make it suitable for integration into railway electrical cabinets, industrial control panels and three-phase monitoring assemblies.
Key Advantages
- Three-phase voltage monitoring for industrial and railway electrical systems.
- Phase-loss detection for identifying missing supply phases.
- Phase-sequence monitoring for detecting incorrect phase rotation.
- 208–480 V AC monitoring range for compatible three-phase supplies.
- Two changeover output contacts (DPDT) for independent control and signalling circuits.
- 8 A contact rating at 250 V AC for appropriately rated electrical loads.
- 0.5 s contact actuation delay for defined monitoring response.
- Railway-specific T-version designed for demanding transport applications.
- Specified against EN 50155, EN 61373 and EN 45545-2 railway standards.
- 22.5 mm slimline construction for space-efficient panel installation.
- DIN-rail mounting and screw terminals for straightforward installation.
- IP20 protection rating for installation within suitable electrical enclosures.
Key Features
- Finder 70 Series electronic monitoring relay.
- Model: 70.62.8.400.0000T.
- Railway industry version.
- Three-phase supply monitoring.
- Phase-loss detection.
- Phase-sequence detection.
- Monitoring voltage range: 3 × 208–480 V AC.
- Nominal voltage designation: 400 V AC.
- Output configuration: 2 changeover contacts (DPDT).
- Rated output contact current: 8 A.
- Output contact electrical rating: 8 A at 250 V AC.
- Contact actuation delay: 0.5 s.
- Operating temperature: −25 to +55 °C.
- Supply: Powered from the monitored three-phase network.
- Connection type: Screw terminals.
- Mounting: DIN rail.
- Enclosure width: 22.5 mm.
- Protection classification: IP20.
- Railway standards: EN 50155, EN 61373 and EN 45545-2.
Reliable Phase Monitoring for Railway and Industrial Electrical Systems
The Finder 70.62.8.400.0000T monitors a connected three-phase AC supply for phase loss and incorrect phase sequence. When the monitored supply satisfies the relay's operating conditions, its output contacts assume their normal operating state. If a phase-loss or phase-sequence fault is detected, the relay changes the state of its two changeover contacts, enabling the connected control system to respond.
The DPDT output arrangement allows two separate control or signalling circuits to be connected, such as a contactor control circuit and a fault indication input. Designed for railway applications, the T-version combines three-phase supervision with relevant railway environmental and equipment requirements. It is a monitoring device rather than a circuit breaker or motor overload relay, so suitable protective and switching devices must be provided separately.
Typical Applications
- Railway electrical control and monitoring systems.
- Rail vehicle auxiliary electrical equipment.
- Three-phase phase-loss and phase-sequence monitoring.
- Industrial motor control panels.
- Railway equipment cabinets and control assemblies.
- Three-phase pump and compressor control systems.
- Industrial ventilation and auxiliary machinery.
- Electrical distribution and automation cabinets.
- Contactor control and phase-fault interlocking circuits.
- PLC-based fault monitoring and signalling systems.
- OEM equipment requiring railway-specific monitoring components.
Technical Specifications
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| Terminal Type | Screw | |
|---|---|---|
| Monitoring Function | Three-phase supply | |
| Monitored Supply | Three-phase | |
| Mounting Type | DIN rail | |
| Manufacturer | Finder | |
| Series | 70 Series | |
| Model | 70.62.8.400.0000T | |
| Product type | Three-phase voltage monitoring relay | |
| Product version | Railway industry version (T) | |
| Monitored parameters | Phase loss and phase sequence | |
| Electrical system | Three-phase AC | |
| Nominal voltage designation | 400 V AC | |
| Monitoring voltage range | 3 × 208–480 V AC | |
| Power supply | From the monitored three-phase network | |
| Output contact configuration | 2 CO / DPDT | |
| Rated output contact current | 8 A | |
| Output contact rating | 8 A at 250 V AC | |
| Contact actuation delay | 0.5 s | |
| Operating temperature range | −25 to +55 °C | |
| Terminal type | Screw terminals | |
| Mounting | DIN rail | |
| Dimensions (H × W × D) | 86.2 × 22.5 × 100.3 mm | |
| Protection rating | IP20 | |
| Railway standards | EN 50155, EN 61373, EN 45545-2 + A1:2016 | |
| EAN / GTIN-13 | 8012823418032 | |
| Product category | Three-Phase Monitoring Relays |
Frequently Asked Questions
What is the Finder 70.62.8.400.0000T used for?
The Finder 70.62.8.400.0000T is a three-phase voltage monitoring relay used to detect phase loss and incorrect phase sequence. It is a railway-specific version suitable for appropriately designed industrial and railway electrical control systems.
What voltage range does the Finder 70.62.8.400.0000T monitor?
The relay monitors three-phase supplies within a 208–480 V AC phase-to-phase voltage range, with a nominal voltage designation of 400 V AC.
Does this relay detect phase loss?
Yes. The Finder 70.62.8.400.0000T provides phase-loss detection, allowing connected control systems to respond when a monitored supply phase is missing.
Can the Finder 70.62.8.400.0000T detect incorrect phase sequence?
Yes. The relay includes phase-sequence monitoring to identify an incorrect phase rotation sequence in a three-phase AC electrical supply.
How many output contacts does the Finder 70.62.8.400.0000T have?
The relay has two changeover contacts (2 CO / DPDT), rated at 8 A at 250 V AC, for appropriately rated control and signalling circuits.
What does the T suffix mean in Finder 70.62.8.400.0000T?
The T suffix identifies the railway industry version, specified against relevant railway standards including EN 50155, EN 61373 and EN 45545-2.
What is the switching delay of this monitoring relay?
The Finder 70.62.8.400.0000T has a specified 0.5 s contact actuation delay.
Does the Finder 70.62.8.400.0000T require a separate auxiliary supply?
No separate auxiliary supply is normally required because the relay is powered from the monitored three-phase network, provided that the supply meets its operating requirements.
What is the difference between the Finder 70.62.8.400.0000T and 70.61.8.400.P000?
The 70.62.8.400.0000T provides two 8 A changeover contacts, uses screw terminals and is intended for railway applications. The 70.61.8.400.P000 provides a single 6 A changeover contact and uses push-in terminals. Both monitor phase loss and phase sequence.
Can this relay be mounted on a DIN rail?
Yes. The Finder 70.62.8.400.0000T is designed for DIN-rail mounting and has a compact 22.5 mm enclosure width with screw terminal connections.
What is the operating temperature range of the railway version?
The Finder 70.62.8.400.0000T has a specified ambient operating temperature range of −25 to +55 °C.
Does this monitoring relay provide motor overload or short-circuit protection?
No. The relay monitors phase loss and phase sequence but does not replace a motor overload relay, fuse or circuit breaker. Suitable switching and protective equipment must be selected separately.
Trusted by Railway, Industrial Automation and Electrical Engineering Professionals
Finder 70 Series monitoring relays are designed for electrical engineers, railway equipment manufacturers, industrial automation specialists and panel builders requiring dependable three-phase supervision, flexible fault signalling and practical integration into railway and industrial electrical control systems.
