ECOLINE explosion-proof design zone 1

B1

Superior controller

F1

Main fuse

F2

Compressor fuse

F3

Control circuit fuse for low voltage

F4

Differential oil pressure switch

F5

High pressure switch

F6

Low pressure switch

F12

Oil heater fuse

F13

Overload protective device

F14

Overload protective device

F17

Control transformer fuse

F18

Control circuit fuse for extra low voltage

F19

Oil level switch

H2

Light "oil supply fault"

H4

Light "motor temperature too high"

K1

Contactor "1st part winding" (PW) or main contactor (star-delta)

K2

Contactor "2nd part winding" (PW) or delta contactor (star-delta)

K3

Star contactor (star-delta)

K1T

Time relay "part winding start" 0.5 s or "star-delta start"

K2T

Time relay "pause time" 300 s

K3T

Time relay "oil supply fault"

K4T

Time relay "alarm delay" 5 s

K6T

Time relay "oil level switch"

M1

Compressor

Q1

Main switch

R1..6

Temperature sensor in motor winding

R7

Discharge gas temperature sensor (each cylinder head is equipped with a discharge gas temperature sensor, including a safety barrier)

R8

Oil heater

S1

Control switch (on/off)

S2

Reset "overtemperature" (motor / discharge gas) and "lack of oil"

S3

Reset "lack of oil"

T1

Control transformer (example of 230 V, required according to EN60204-1)

U

Interference suppressor (if required)

Y1

Solenoid valve "start unloading"

Y2

Solenoid valve "liquid line"

Y3

Solenoid valve "capacity control"

SE-*

Compressor protection device for motor and discharge gas temperatures