ML0021 August 15, 2018
7 Copyright 2018 Bitronics, LLC
Physical
Connections
(Signal Input
Modules)
Current (S10,
S11, S12)
Terminal block with 10-32 Studs for current inputs. Use ring lugs sized for #10 stud.
Accepts #10-16 AWG (5.3-1.3mm
2
) wire. Recommended Torque: 16 In-Lbs, 1.81 N-m.
Current inputs are connected to the output from the secondary of permanently installed
Current Transformers (CTs). Grounding of CT signals per ANSI/IEEE C57.13.3-1983 is
required.
Current (S13,
S14, S15, S16,
S17)
Terminal block with 8-32 Screws for current inputs. Use ring lugs sized for #10 screw thread.
Accepts #10-22 AWG (5.3-0.33mm
2
) wire. Recommended Torque: 16 In-Lbs, 1.81 N-m.
Current inputs are connected to the output from the secondary of permanently installed
Current Transformers (CTs). Grounding of CT signals per ANSI/IEEE C57.13.3-1983 is
required.
External Split-
Core CTs
S1C, S2C
2 position removable terminal block, accepts 26-14AWG stranded wire. Recommended
Torque 7 in-lbs, 0.79N-m.
Overcurrent
protection
for Voltage
(measurement)
input (VT)
connections
To maintain the safety features of this product, a 3 Ampere time delay (T) fuse must be
connected in series with the ungrounded/non-earthed (hot) side of the supply input connected
to the voltage measurement (VT) input of the instrument prior to installation. The fuse must
carry a voltage rating appropriate for the power system on which it is to be used.
3 Ampere
slow blow UL Listed fuse in an appropriate fuse holder should be used in order to maintain
an
UL product approval.
Voltage
(CE units)
Removable Terminal Block, accepts #22-12 AWG (0.35 to 3.3mm
2
) wire, or terminal lugs up
to 0.250" (6.35mm) wide. Standard 0.200" (5.08mm) header socket accepts other standard
terminal types. Precautions must be taken to prevent shorting of lugs at the terminal block.
A minimum distance of 1/8" (3mm) is recommended between uninsulated lugs to maintain
insulation requirements. Recommended Torque: 10 In-Lbs, 1.13 N-m
Voltage
(non-CE)
Removable Terminal Block, accepts #22-12 AWG (0.35 to 3.3mm
2
) wire, or terminal lugs up
to 0.325" (8.25mm) wide. Standard 0.200" (5.08mm) header socket accepts other standard
terminal types. Precautions must be taken to prevent shorting of lugs at the terminal block.
A minimum distance of 1/8" (3mm) is recommended between uninsulated lugs to maintain
insulation requirements. Recommended Torque: 10 In-Lbs, 1.13 N-m
Class I equipment to IEC61140: 1997
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