Vanguard MCCB-250 User Manual download pdf (Page 8)

MCCB-250 USER’S MANUAL REV 2

Table 2. Functional Descriptions of MCCB-250 Controls and Indicators

Item

Number

Panel Markings Functional Description

COM Current source common terminal.

250A 250A current source terminal.

120A 120A current source terminal.

25A 25A current source terminal.

5A 5A current source terminal

RS-232C

RS-232C (serial) interface port for factory firmware programming and

diagnostics.

90-120 Vac

50-60 Hz, 20A

200-240 Vac

50-60 Hz, 20A

Input power connector.

None Circuit Breaker/Power Switch.

GROUND

MCCB-250 ground stud. Connect ground stud to substation ground using

provided cable.

CURRENT

CONTROL

Current control knob.

HIGH

CURRENT

PRESENT

High current presence indicator LED.

None

Back-lit LCD screen (20 characters by 4 lines), viewable in bright sunlight and

low-light levels.

Up and Down

Arrows

The up and down arrows are used to control the current source output and

timer. Three modes are available:

ON+TMR : Turn on current source and timer

OFF: Turn off current source and timer

MONT: Turn on current source momentarily

CONTRAST LCD screen contrast control.

15 & 16

EXT CURRENT

(0-10A)

External current input connectors.

DRY CONTACT

WET CONTACT

CURRENT

Timer and current source stop input selection with LED indicator.

18 & 19

TIMER STOP Timer “STOP” input connectors.

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 16 17

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