Altronic 6715 D Посібник - Сторінка 15

Переглянути онлайн або завантажити pdf Посібник для Промислове обладнання Altronic 6715 D. Altronic 6715 D 20 сторінок. Coaxial load resistor

4-1. General. The Model 6715D contains a 50 ohm non-reactive resistor assembly which is

cooled by forced air supplied by a centrifugal blower assembly. Control of the blower and

of the transmitter interlock circuit is accomplished with a single rocker switch and five

thermal switches.

4-2. Control Circuits. Control Power is derived from a Control Transformer that is fed by a 3

ampere circuit breaker. The Control Transformer provides power for the operation of the

Transmitter Interlock Circuit and Blower Control. The blower assembly is powered by a

separate breaker that can vary in ampacity depending on the current draw of the Blower

Assembly (see Specifications).

Blower Control Circuit: Three thermal switches and one rocker switch are connected to AC

Control Line 1. The thermal switches are Single Pole, Normally Open, and close at a

specific temperature (as detailed in the schematics) and connect to Blower Contactor

"RYI" terminal 0, as does the SPST rocker switch. Blower contactor "RY1" terminal 1,

connects to AC Control Line 2. The blower indicator lamp is connected in parallel with the

contactor coil.

Transmitter Interlock Circuit: Two thermal switches are connected in series from Control Line 1

to Interlock Relay "RY2" terminal 13. These thermal switches are Single Pole, Normally

Closed, and open at a specified temperature (as detailed in the schematics). The overheat

lamp is connected from Line 1 to interlock relay "RY2" Terminal 13. Interlock relay

"RY2" terminal 14 is connected to Control Line 2.

Interlock relay (RY2) terminals 5 & 6 are paralleled and are connected to interlock terminal strip

(TB1)-1. Interlock relay (RY2) terminals 9 & 10 are paralleled and are connected to

interlock terminal strip (TB1) terminal 2. This terminal pair will be closed when there is

AC main power to the load.

When sold with two sets of Normally Closed terminals at TB1 interlock relay (RY2) terminals 7 &

8 are paralleled and are connected to interlock terminal strip (TB1) terminal 4. Interlock

relay terminals 11 & 12 are paralleled and are connected to interlock terminal strip (TB1)

terminal 3. This terminal pair will be closed when AC power is supplied to the load.

When sold with one set of Normally Closed terminals and one set of Normally Open terminals at

TB1 interlock relay (RY2) terminals 3 & 4 are paralleled and are connected to interlock

terminal strip (TB1) terminal 4. Interlock relay terminals 11 & 12 are paralleled and are

connected to interlock terminal strip (TB1) terminal 3. This terminal pair will be open

when AC power is supplied to the load.

6715D/Rev. Jul.2020

SECTION IV

THEORY OF OPERATION

Page 15

Altronic Research Inc.