1
Introduction
16
Alpha Technologies
1.6
Manual Bypass Module (MBM) System (Continued)
1.6.2: Manual Bypass Module
1
Line power is connected to this terminal block.
2
The loads are connected to this terminal block.
3
This 20 Amp. circuit breaker provides overcurrent protection to the UPS and acts as a line
power on/off switch to the UPS.
4
This break-before-make rotary switch toggles the MBM between Line/Transfer mode and
UPS mode. When used in conjunction with the circuit breaker, you can turn the power on or
off to the UPS (Figure 1.6.1).
5
This thermostat allows you to control the temperature when the enclosure’s fan is turned on.
6
This
1
/
4
Amp. 1.5 x 0.25 inch slow-blow fuse provides overcurrent protection for the fan.
Replace the fuse with one of:
•
Alpha Technologies part number 460–412–10.
•
LittleFuse 313.250.
•
Buss MDL–
1
/
4.
7
The UPS’s input is connected to this terminal block.
8
The UPS’s output is connected to this terminal block.
Figure 1.6.2
Manual Bypass Module Front Panel
FAN FUSE
USE ¼ AMP
SLOW BLOW
FUSE ONLY
FAN
FAN THERMOSTAT
CB1
UPS INPUT
CIRCUIT
BREAKER
0
I
1–LINE/TRANSFER MODE
2–UPS MODE
TURN SWITCH TO TRANSFER MODE THEN
TURN OFF CB1 BEFORE SERVICING UPS
L
N
AC OUTPUT
AC INPUT
L
N
L
N
FROM UPS
TO UPS
L
N
1
2
3
4
5
6
7
8
