7. Technical information
7.1 Technical specifications
Accuracy Class 1.0
-25 to 15 to 30 to 70 °C
Temperature coefficient: +/-0.2 % of full scale per 10 °C
Positive, negative and zero sequence alarms: class 1 within 5 % voltage unbalance
Class 1.0 for negative sequence current
Fast over-current: 3 % of 350 %*In
Analogue outputs: class 1.0 according to total range
Option EF4/EF5: class 4.0 according to total range
To IEC/EN 60688
Operating
tempera-
ture
-25 to 70 °C (-13 to 158 °F)
With option N: -25 to 60 °C (-13 to 140 °F)
(UL/cUL Listed: max. surrounding air temperature: 55 °C/131 °F)
Storage
tempera-
ture
-40 to 70 °C (-40 to 158 °F)
Climate 97 % RH to IEC 60068-2-30
Operating
altitude
0 to 4000 m above sea level
Derating 2001 to 4000 m above sea level:
Max. 480 V AC phase-phase 3W4 measuring voltage
Max. 690 V AC phase-phase 3W3 measuring voltage
Measuring
voltage
100 to 690 V AC +/-20 %
(UL/cUL Listed: 600 V AC phase-phase)
Consumption: max. 0.25 VA/phase
Measuring
current
-/1 or -/5 A AC
(UL/cUL Listed: from CTs 1 to 5 A)
Consumption: max. 0.3 VA/phase
Current
overload
4 × I
n
continuously
20 × I
n
, 10 s (max. 75 A)
80 × I
n
, 1 s (max. 300 A)
Measuring
frequency
30 to 70 Hz
Aux. supply Terminals 1 and 2: 12/24 V DC (8 to 36 V continuously, 6 V 1 s). Max. 11 W consumption
Battery voltage measurement accuracy: ±0.8 V within 8 to 32 V DC, ±0.5 V within 8 to 32 V
DC @ 20 °C
Terminals 98 and 99: 12/24 V DC (8 to 36 V continuously, 6 V 1 s). Max. 5 W consumption
The aux. supply inputs are to be protected by a 2 A slow-blow fuse
(UL/cUL Listed: AWG 24)
Digital in-
puts
Optocoupler, bi-directional
ON: 8 to 36 V DC
Impedance: 4.7 kΩ
OFF: <2 V DC
ML-2 installation instructions 4189340582
UK
Technical information
DEIF A/S Page 61 of 64
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