SamplexPower PSR-1200-24, Руководство пользователя, Страница: 16 / 100

16 | SAMLEX AMERICA INC.
SECTION 5 | Description & Principles of Operation
5.4 TRANSFER RELAY SECTION
In this unit, set of Transfer Relays are used to (i) switch the AC load between the AC GRID and the Inverter
(Section 5.4.1) and (ii) to switch Neutral to Chassis Ground bonding i.e. bond the Output Neutral to the
Chassis Ground in Inverter Mode and unbond when in Bypass Mode (Section 5.4.3). Connection diagram of
these relays is shown in Fig 5.1 below:
L
N
G
120 VAC Inlet
(18, Fig 6.2)
Nin
NO NO
RL-2
Lin
NO NO
RL-1
L(A)
L(B)
15A AC Input Breaker
(19, Fig 6.2)
1 2 3 4
NO
RL-5
RL-4
NC
NO
NC
RL-3
NO
NC
L_OUT
N_OUT
Inv (N)
Inv (L)
From Inverter
Section
L
G
N
L
G
NEMA5-20R
Duplex AC
Outlet
(17, Fig 6.2)
N
Wire Jumper
J2 J3
Metal Chassis
Ground of the unit
Fig. 5.1: Connection Diagram of Transfer & N-G Bond Switching Relays
LEGEND FOR FIG 5.1
Item Description
RL-1, RL-2 (i) Relay - Double Pole, Normally Open (DPNO, Contact Form 2A): 16A, 250 VAC
(ii) Energized as soon as AC GRID input is available [These 2 relays are powered by 12 VDC
Switched Mode Power Supply (SMPS) fed from AC GRID input and not from 24V / 48V
Inverter Battery]
RL-3 (i) Relay - Single Pole Double Throw (SPDT, Contact Form 1C); 16A, 240 VAC
(ii) Energized when Inverter is supplying the load. When energized, it bonds the output Neutral
to the metal chassis Ground of the unit.
RL-4, RL-5 (i) Relay - Single Pole Double Throw (SPDT, Contact Form 1C); 16A, 240 VAC
(ii) Energized when the Inverter is supplying the load
NO Normally open contact of relay
NC Normally closed contact of relay