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.
Technical Specifications
- 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
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.
