TM 10-5410-221-24
Section VI. ELECTRICAL SYSTEM TEST
be used as a guide for testing of the electrical system.
General
The sequence of the test is to be followed in the order
This section provides direct and general support
listed. Figure 5-2 illustrates the test points indicated in
maintenance personnel with general testing and
checking instructions applicable to the expandable
schematic of the electrical system. Table 5-1 lists
shelter electrical system.
electrical power sources needed.
Electrical System Test Procedure
a.
General. The procedure outlined below shall
Table 5-1. Electrical Power Requirement
Item
Description
System
DC power
External 28 VDC
Check
emergency
lighting
system
400 Hertz AC
4-Wire service 120/208 VAC
3KW
and pump
60 Hertz AC
3-Wire service 120/240 Volts
service
b.
Preliminary Test.
(7) Remove the circuit breaker panel from the
electrical distribution box and perform the following test.
(1) Open all circuit breakers located in the
power distribution box.
one terminal of the ground terminal block TB4 (located in
(2) All switches shall be in the "off" position.
back of the electrical distribution box). With the other
(3) Remove all power feed cables attached to
lead check each connection of all circuit breakers. All
"input or output" receptacles.
points should be clear of grounds.
(4) Remove all plugs from all receptacle on
(9) Replace the circuit breaker panel.
ceiling or wall or distribution box. (Exception: The
(10) Open all circuit breakers on power
surgery light fixture need not be removed should this
distribution panel.
device be plugged into the raceway surgery light
c. Power on Test.
receptacle).
(1) Connect 400 Hertz and 60 Hertz cables to
(5) Using a continuity light or continuity
connector J-1 and J-3, located at water ,box end of
checker, determine the continuity of the following input to
shelter.
output connectors located in the power service input and
(2) Apply power to 400 Hertz and 60 Hertz
output panels located on the outside of the shelter.
cable to energize shelter.
Check the circuit of the 400 Hertz input connector J-1 to
the output connecort J-2.
voltage at output connectors in power output box as
follows.
J-1 Pin A to J-2 Pin B
(a) J-2 400 cycles.
J-1 Pin B to J-2 Pin C
J-1 Pin C to J-2 Pin A
J-1 Pin D to J-2 Pin D
Pin D (neutral) to
120 V.
J-1 Pin E to J-2 Pin E
pins A, B, and C.
J-1 Pin E to Shelter Ground
Voltage between and
208 V.
(2) of following
(6) Check circuit of the 60 Hertz input
pins A, B, and C.
connector J-3 to the output connector J-4.
Pin E, common to
ground, and pin
J-3 Pin A to J-4 Pin A
D neutral.
J-3 Pin B to J-4 Pin D
J-3 Pin C to J-4 Pin C
J-3 Pin D to J-4 Pin B