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Procedure 8-5
Setting equalize (EQL) voltage level
Use this procedure to adjust a replacement rectifier for equalize voltage in a
modular business package (MBP) master cabinet that is currently carrying
traffic.
Documentation references
Equipment Installation Operation and Maintenance for MPR25 / MPR15
Series Single Phase –48 V, 25 A Switch Mode Rectifier NT5C06, 169-2071-500
Test sets
Voltmeter rms Fluke 8050A (or equivalent)
Tools
Screwdriver, slotted, small (0.1-inch width)
Cautions
Observe all cautions listed in the beginning of this chapter.
Rectifier and battery adjustments and connections
Table 8-2 shows the Nortel Networks recommended rectifier settings for the
optional battery selections.
Table 8-2
Rectifier adjustment settings
Battery
manufacturer
Johnson Control
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
High-voltage
Equalize
shutDown
(EQL)
(HVSD)
–56.0 ± 0.1
–55.5 ± 0.1
Note: Batteries are individually fused on the battery equipment module
(BEM).
Testing the batteries and rectifiers 8-21
Float
(FLT)
–54.5 ± 0.1
—continued—
Low-voltage
Low-voltage
alarm
disconnect
(LVA)
(LVD)
–47.0 ± 0.1
–42.5 ± 0.1
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