GE NGV11A Series Undervoltage Relay
GE NGV11A Series Undervoltage Relay
DESCRIPTION
The NGV relay is a high-speed relay designed for calibration on decreasing voltage (drop-out), or increasing voltage (pick-up) and may be continuously energized at rated voltage. The NGV19 is a special relay available for application as a battery monitor. The NGV is an instantaneous, voltageoperated, hinged-armature telephone type relay. It is available with one, two, or three independent units in one case. These units are designed for DC applications. Where the relays are to be applied to AC, a bridge-type circuit provides full-wave rectification for the coil circuit. See Fig. 1. In both the AC and DC versions, a zener diode in the coil circuit establishes a sharply defined set point controlled by a rheostat that is mounted on the front of the relay.
Application
■ Battery monitor
■ Emergency throwover control equipment
■ Ground fault on ungrounded systems
■ Telephone or telemetering services
Protection and Control
■ Instantaneous DC undervoltage
■ Time delay DC undervoltage available
■ Ground and phase fault detection
Features
■ Hinged armature telephone type units
■ AC and DC versions available
■ Operated continuously picked-up
■ Drawout case available
■ Up to 3 independent units per case
Instructions and warnings related to the operation of the product:
The following specifications must be strictly observed:
The technical specifications and typical applications of the product system must be strictly observed.
PERSONNEL TRAINING: Only trained personnel may install, operate, maintain or repair the product system. These personnel must be instructed on the
These personnel must be instructed and briefed on the conditions in the hazardous area.
Unauthorised modifications: No modifications or structural changes may be made to the product system.
Maintenance Responsibility: It must be ensured that the product system is only used under appropriate conditions and in a condition that is fully fit for purpose.
Working environment: The user must fulfil the specified environmental conditions:
Safety regulations
The following safety regulations must be fully observed when (maintenance) work is carried out on the product system:
1 Disconnect completely.
2 Secure to prevent reconnection.
3 Confirm that the installation has been completed.
4 Perform grounding and short-circuiting.
APPLICATIONS
• Simulation
• Instrumentation
• Industrial control
• Process control and monitoring
• Factory automation
• Intelligent networked PLC controllers
• Automated test
• Data acquisition
- User name Member Level Quantity Specification Purchase Date
- Satisfaction ：
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