Digital Earth Fault Relay – EF18D
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DTL Digital
Relay
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Mounting
Flush
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MTB
ANSI 86 Lockout
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Fault & Operation
Record
Built for Safety
- Flame Retardant material tested against UL94v-0 fire standards
- MTB ANSI 86 Lockout Relay
- Enhanced test trip function prevents accidental activation of the relay’s ‘Test Trip’ command
MTB
MTB or Mechanical Trip Button is a proprietary lockout feature that prevents an operator from re-energizing the circuit breaker before isolating the fault and resetting the MTB.
When activated, the MTB latches the output contacts and continues to indicate the presence of a fault until it is cleared, and the relay reset. All these are achieved without the need for an auxiliary power supply to the relay.
LEARN MORETripping Events Recording
4 tripping events include the types, magnitude of the fault with data and time stamping. It reduces the time needed on fault tracing.
High Contrast LCD Display
Viewing all settings, live value, tripping event with date & time stamping in one screen. User friendly and easy to use.
Rated IP31 (front) and IP20 (rear)
Protection against foreign objects and water with IP31 (front) and IP20 (rear).
Communications
Built-in Modbus-RTU to communicate with SCADA, Building Management System (BMS) and Energy Management Information System (EMiS).
Tested in accordance with IEC standards
Product safety, EMC compatibility, environmental, vibration, shock and bump tests.
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EMS
Compatibility
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Environmental
Test
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Product
Safety
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Vibration, Shock, Bump
Test
Technical Data
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Power Supply
AC/DC 85-265V (other voltage available)
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MTB Fault Indication System
ANSI 86 Lockout Relay
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Product Safety Requirements
IEC 60255-27
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Earth Fault Setting
2.0 – 50.0 % (0.1% per step)
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Event Records
4 tripping events data/time stamping
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Electromagnetic Compatibility
IEC 60255-26
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Delay Time Setting
0.10 – 2.00 sec (0.01 sec per step)
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Output Contacts
2x NO (Normally Open)
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Cyclic Temperature with Humidity
IEC 60255-1
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Reset Current Value
90% of operating value
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Protection Class
IP 31 (front), IP20 (rear)
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Vibration, Shock and Bump
IEC 60255-21-1
IEC 60255-21-2 -
Overcurrent withstandability
10 * current setting for 1 sec
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Communication
Modbus RS485 built-in
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Safety
CE Marking
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