Specifications

Simplex, Inc., 5300 Rising Moon Road, Springﬁ eld, IL 62711-6228 • 217-483-1600 • Fax 217-483-1616

LOAD BANK MANUAL • Merlin 150-300 Load Bank • page 7 of 15

LOAD O VER V OLTAGE

D ETECTION S UBSYSTEM

The over voltage detection network is

activated only when a high (greater

than 380V) voltage test source is ap-

plied and the “Voltage Selector” switch

(S1) is incorrectly placed in the “Low

Voltage” position. When the switch is

in the “Low Voltage” position load bus

voltage is supplied to the Over Voltage

Relay (OVR) via Transformer T1. When

load voltage becomes great enough the

Over Voltage Relay (OVR) energizes.

OVR contacts 4–7 close and illuminate

the “Over Voltage” lamp. OVR contacts

9–3 open and interrupt the circuit to

the Master Load switch (S2). The load

cannot be re-applied until the control

power system is reset and the load

voltage selector switch is placed in the

high voltage position.

LOAD ELEMENTS

The Merlin Load Bank utilizes spe-

cially designed, “Powr-Web” resistive

elements. The elements are rigidly

supported by high-temperature, ceram-

ic-clad, stainless-steel rods. Element-

to-element short circuits are virtually

eliminated. The load elements are pro-

tected by 200KAIC, 600VAC fuses.

Do Not allow the Load Bank to

operate unattended for extended

periods.

Part of Typical Control Section Drawing