Table 13.18
ACM3.1 terminals
Module
Count
Symbol
Type
Name
L1
L1
L2
L2
L3
L3
N
N
ACM3.1
L1
S1
S2
L2
S1
S2
L3
S1
S2
*
S1
S2
4
1
2
3
4
5
6
7
10
9
8
11
12
13
14
15
16
2 × (L1, L2, L3 and N)
L1/L2/L3/N
Voltage
3-phase voltage measurements
1 × (L1, L2, L3 and 4th)
S1
S2
Current
3-phase current measurement
4th current measurement
Table 13.19
ACM3.1 technical specifications
Category
Specification
Voltage measurements
Nominal value: 100 to 690 V AC phase-to-phase
Measurement range: 2 to 897 V AC phase-to-phase
Accuracy: Class 0.2
Phase angle accuracy: 0.1° (within nominal voltage range and nominal frequency range)
Altitude derating from 2,000 to 4,000 m (6,562 to 13,123 ft): 100 to 480 V AC phase-to-phase
UL/cUL Listed: 100 to 600 V AC phase-to-phase
Load on external voltage transformer: Maximum 0.2 VA/phase
Voltage withstand: 1.2 × Nominal voltage continuously; 1.3 × Nominal voltage for 10 s
Current measurements
Nominal value: 1 or 5 A AC from current transformer
Measurement range: 0.02 to 17.5 A AC from current transformer; Truncation level: 11 mA
Accuracy: Class 0.2
Earth current: 18 dB attenuation of third harmonic of the nominal frequency
UL/cUL Listed: From listed or R/C (XOWD2.8) current transformers 1 or 5 A
Load on external current transformer: Maximum 0.3 VA/phase
Current withstand: 10 A continuously; 17.5 A for 60 s; 100 A for 10 s; 250 A for 1 s
Frequency measurements
Nominal value: 50 Hz or 60 Hz
Measurement range: 35 to 78 Hz
Accuracy: Class 0.1 of nominal value (35 to 78 Hz) (-40 to 70 °C) (-40 to 158 °F)
Class 0.02 of nominal value (40 to 70 Hz) (15 to 30 °C) (59 to 86 °F)
Power measurements
Accuracy: Class 0.5
Accuracy and temperature
Unless otherwise specified for the above measurements:
Nominal range: -40 to 70 °C (-40 to 158 °F)
Reference range: 15 to 30 °C (59 to 86 °F)
Accuracy: Measurement type specific within reference range.
Additional 0.2 % error of full scale per 10 °C (18 °F) outside reference range.
DESIGNER'S HANDBOOK 4189340911K UK
Page 432 of 521
