
DTL Earth Fault Relay – EF18
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DTL
Relay
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Mounting
Flush
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MTB
ANSI 86 Lockout
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Setting
Knob adjustment

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.
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Protection Degree
IP31 (front) and IP20 (rear). IP65 optional.
Tested in accordance with IEC standards
Product safety, EMC compatibility, environmental, vibration, shock and bump tests.
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EMC
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
AC200-265V (other voltage available)
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Overcurrent Withstandability
10 * fault current for 3 sec
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Product Safety Requirements
IEC 60255-27
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Fault setting
0.1 – 2 A
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Housing Material
ABS resin complying with UL94VO
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Electromagnetic Compatibility
IEC 60255-26
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Delay Time Setting
0 – 1 sec
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Protection Class
IP 31
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Cyclic Temperature with Humidity
IEC 60255-1
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Operating Time
With 105% input < 300 millisecond With > 200% input < 100 millisecond
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Output Contacts
2x NO (Normally Open)
250VAC 5A -
Vibration, Shock and Bump
IEC 60255-21-1
IEC 60255-21-2 -
Reset Current Value
≤ 90% of operating value
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Relative humidity
95% at +40°C
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Safety
CE Marking
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Product Enquiry
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a consultation to meet your individual needs. We look forward to hearing from you.