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+/- 190Vdc Line Power Circuit Cable Pair
Verification Procedure
Purpose:
The following details the procedure for the verification of existing installed cable pair service for +/- 190V Line
Power circuits.
Each cable pair will be verified.
Cable pairs passing will be recorded for future reference with inactive pairs being marked for out of service.
Test Equipment:
The required test equipment will include the following:
• Multi-meter
• CP3200 +/- 190V Line Power System
Test Procedure:
Perform the following steps for each cable pair.
Record the results in the table provided at the end of this document.
Testing will be performed in two manners.
These include testing for the presence of AC voltage on the open ended conductor pairs and testing for presence
of dc voltage on cable pairs.
Test Parameters:
• Insure the outboard side of the cable pairs have not been terminated
• Insure that NO surge protection devices are in place during the verification testing.
• Insure NO cable pair bridge taps have been inserted.
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Testing for The Presence of AC Voltage:
Using your multi-meter set for AC voltage, measure for the presence of AC voltage between the following:
• Between Tip and Ring
• Between Tip and Ground
• Between Ring and Ground
Note: If voltage is present on any of the preceding measurements for each cable pair, note that cable pair in the
following table 1. That AC fault must be cleared to proceed in using that cable pair.
Adjust the meter to read AC voltage and carefully connect the multimeter leads to the RING and TIP terminals for
each cable pair connection. If any AC voltage is measured, note the level on Table 1.
Adjust the meter to read AC voltage and carefully connect the multimeter leads to the RING and TIP terminals for
each cable pair connection. If any AC voltage is measure, note the level on Table 1.
Adjust the meter to read AC voltage and carefully connect the multimeter leads to the RING and GROUND terminals
for each cable pair connection. If any AC voltage is measure, note the level on Table 1.
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Testing for The Presence of DC Voltage:
Using your multi-meter set for DC voltage, measure for the presence of DC voltage between the following:
• Between Tip and Ring
• Between Tip and Ground
• Between Ring and Ground
Note: If voltage is present on any of the preceding measurements for each cable pair, note that cable pair in the
following table 1. That DC fault must be cleared to proceed in using that cable pair.
Adjust the meter to read DC voltage and carefully connect the multimeter leads to the RING and TIP terminals for
each cable pair connection. If any DC voltage is measured, record the data in Table 1.
Adjust the meter to read DC voltage and carefully connect the multimeter leads to the TIP and GROUND terminals
for each cable pair connection. If any DC voltage is measured, record the data in Table 1
Adjust the meter to read DC voltage and carefully connect the multimeter leads to the RING and GROUND terminals
for each cable pair connection. If any DC voltage is measured, record the data in Table 1.
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© 2021 ABB. All rights reserved.
Testing for Loop Pair Insulation Resistance
The purpose of verifying the loop pair insulation resistance test is to establish the insulation has not broken down
to the point of a short circuit condition.
Test Parameters:
• Insure the outboard side of the cable pairs have each been shorted.
• Insure that NO surge protection devices are in place during the verification testing.
• Insure NO cable pair bridge taps have been inserted.
• Insure that NO power has been applied to the cable pairs during this test.
AC Presence
Pass - Fail Tip to Ring
Resistance
Ring to Ground
Resistance
Tip to Ground
Resistance
CABLE Pair
Pass/Fail
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Procedure
Using your multi-meter set for ohms (resistance) measurement. IF any pair reads less than 100K ohm, discard that
pair. For each cable pair, measure the value of insulation resistance between the following terminals.
• Between Tip and Ring
• Between Tip and Ground
• Between Ring and Ground
Note: If the insulation resistance reads less than 100K ohms on any pair, do not use for Line Power.
Table 1 Recorded Data
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© 2021 ABB. All rights reserved.
Loop Pair Insulation Resistance Testing
Adjust the meter to the ohms range and carefully connect the multimeter leads to the RING and TIP terminals for
each cable pair connection. If any resistance is measured > 100K ohms, do not use for Line Power.
Adjust the meter to the ohms range and carefully connect the multimeter leads to the TIP and GROUND terminals
for each cable pair connection. If any resistance is measured > 100K ohms, discard that pair
Adjust the meter to the ohms range and carefully connect the multimeter leads to the RING and GROUND terminals
for each cable pair connection. If any resistance is measured > 100K ohms, do not use for Line Power.
Full System Test
Using a CP3200 to turn up the individual cable pairs, sequentially add line cards. After the insertion of each line
card, confirm the “Green Lights” are illuminated as each circuit card is added. If any light show as “RED” move the
card to a different circuit pair and tag that cable pair. Do not sign off on the site until all the circuits show “GREEN”
for a full day.
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Notes:
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© 2021 ABB. All rights reserved.
Notes:
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© 2021 ABB. All rights reserved.
We reserve the right to make technical changes or modify the
contents of this document without prior notice. With regard
to purchase orders, the agreed particulars shall prevail.
ABB does not accept any responsibility whatsoever
for potential errors or possible lack of information in this
document.
We reserve all rights in this document and in the subject matter and
illustrations contained therein. Any reproduction, disclosure to third
parties or utilization of its contents – in whole or in parts – is
forbidden without prior written consent of ABB.
Copyright© 2021 ABB
All rights reserved
ABB
601 Shiloh Rd.
Plano, TX USA
abbpowerconversion.com
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