Siemens – Contactor Relay – Mehta Electric Corporation

Siemens – Contactor Relay

Used in control circuits for switching and signaling purposes as well as used for interfacing with the electronic circuits.

Contactor Relays 3TH30

Applications:

3TH30 are used in control circuits for switching and signaling purpose. Also they are used for interfacing with the electronic circuits.

Standards

Contactor relay conforms to IS /IEC 60947-5-1. They also carry CE mark.

Range

Air break contactor relays are suitable for 10A, (AC15/AC14 rating) at 240V AC and 10A, (DC13 rating) at 24V DC.

Construction

Benefits and featuresTechnical data

Flexibility

Choice of auxiliary contacts: 3TH30 contactor relays comes with 4 contacts as a basic unit (4NO, 3NO+1NC, 2NO+2NC). However the contacts can be extended upto 8 contacts by adding maximum 4 auxiliary contact blocks to this basic unit. This offers flexibly in selection and configuration.
Choice of mounting: 3TH30 can be mounted on 35mm DIN rail and they are also suitable for screw mounting.

Long Life

Superior design of current carrying parts, contact system and the magnet system increases the reliability which also results into higher electrical and mechanical endurance.

High reliability

Double Break Parallel Bridge contact mechanism: This mechanism is available with 3TH30. Such contact mechanism ensures reliable contact at low voltage and low currents (5mA at 17V DC). It also offers unmatched reliability as well as capability to integrate directly into PLC or instrumentation circuits

User friendliness and safety

Positively driven contacts

3TH30 auxiliary contactors satisfy the conditions for positively driven operation between NO and NC contacts. NO and NC contact do not close at the same time. This is extremely important when they are used in safety circuits of critical applications. This ensures operator safety even during abnormal condition.

SIGUT Termination

Figure touch proof terminals: It protects against accidental contact with live parts which ensures operator safety.
Funnel shaped cable entries: Reduce wiring time by facilitating quick location of the connecting wire.
Cable end-stop: It decides the insertion depth of the connecting wires. Since the insertion depth is predetermined, insulation of the cable can be cut accordingly and the possibility of insulation getting inadvertently caught under the terminal is avoided.
Captive Screws: This feature prevents the screws from falling down thereby facilitates the wiring. Hence, the auxiliary contactors are delivered with untightened terminals. This eliminates the operation of untightening terminals before wiring.
Lug less termination: This feature helps in reducing the termination time.

Power Contactors 3TF

Applications:

3TF power contactors are suitable for switching and controlling squirrel cage and slip-ring motors as well as other AC loads, such as solenoids, capacitors, lighting loads, heating loads and transformer loads.

Standards

Contactors conform to IS/IEC 60947-4-1. They also carry the CE mark

Coordinated feeder

Contactors and bi-relays have been tested for type-2 coordination at Iq = 50kA, 415V AC, 50Hz as per IS/IEC 60947-4-1, for both fuse protected as well as fuseless motor feeders.

Range

Air break contactors are available from 9 A to 475A in 3 pole version. Also available in 2 pole AC version from 45A to 400A.

Construction

Benefits and featuresTechnical data

Flexibility

Choice of Auxiliary contacts

Contactor	Aux.contacts on basic unit	Permissible add-on contact blocks
9A / 12A	1 NO	Upto 4NO or 4NC
9A / 12A	1 NC	Upto 4NO or 4NC
16A/22A	–	Upto 4NO or 4NC
32A/38A	–	Upto 4NO or 4NC
45A to 475A	2NO+2NC	2 x (1NO+1NC)

Choice of mounting

Contactor can be mounted on 35mm DIN and they are also suitable for screw mounting (9-38A – DIN / Screw mounting and 45-475A – Screw mounting).

Choice of coil voltages

AC 50Hz coil code: 3TF30 to 3TF56

Coil voltage (V)	24	42	110	230	415
Code	B0	D0	F0	P0	R0

Wide band AC 50 Hz coil code: 3TF30 to 3TF35

Coil voltage (V)	70-140	150-280	260-460
Code	W110	W220	W415

AC 50/60 Hz coil code: 3TF57

Coil voltage (V)	110-132	220-240	380-460
Code	F7	M7	Q7

DC coil code: 3TF30 to 3TF57

Coil voltage (V)	24	42	48	110	220	250+
Code	B4	D4	W4	F4	M4	N4

High performance

No duration upto 55°C: Contactors are suitable for operation in service temperature upto 55°C without derating. This avoids selection of higher rated contactor, thereby reducing cost.
Long Life: Superior design of current carrying parts, contact system and the magnet system increases the reliability results into higher electrical and mechanical endurance.
High short-time rating: Contactors have a high short-time rating, which makes them suitable for applications having high starting currents and long run-up times.

High reliability

High insulation voltage and impulse withstand voltage capacity ensures reliable performance during occasional abnormal increase in supply voltage

Double break parallel bridge contact mechanism

This mechanism is available for auxiliary contacts. Such contact mechanism ensures reliable contact at low voltage and low currents (5mA at 17VDC). It also offers unmatched reliability. (Chances of 2 mal-operations in 100 mill. operations as against 4460 for single bridge contacts)

SIGUT Termination

Figure touch proof terminals: It protects against accidental contact with live parts which ensures operator safety.
Funnel shaped cable entries: Reduce wiring time by facilitating quick location of the connecting wire.
Cable end-stop: It decides the insertion depth of the connecting wires. Since the insertion depth is predetermined, insulation of the cable can be cut accordingly and the possibility of insulation getting inadvertently caught under the terminal, is avoided.
Captive Screws: This feature prevents the screws from falling down thereby facilitates the wiring. Hence, the contactors are delivered with untightened terminals. This eliminates the operation of untightening terminals before wiring.
Lug less termination: This feature helps in reducing the termination time.

Positively driven contacts

3TF contactors satisfy the conditions for positively driven operation between the main power contacts and the NC contacts. NC contacts positively open before the main contact closes. This is extremely important when power contactors are used in safety circuits of critical applications.

User friendliness and safety

Arc Chamber Interlock (45A and above): It prevents the contactor from switching ON, if the arc chamber is not fitted properly. Thus avoids accidents to plant and personnel.