917

AGASTAT

Dimensions are shown for

reference purposes only.

Dimensions are in inches over

(millimeters) unless otherwise

specified.

Catalog 1308242

Issued 3-03

Specifications and availability

subject to change.

www.tycoelectronics.com

Technical support:

Refer to inside back cover.

This diagram illustrates

amplification obtained

by the articulated

operating mechanism.

SERIES GP

SERIES TR

10 Amp Control Relay

Non-latching, Latching & Timing Versions

File E15631

File LR29186

Users should thoroughly review the technical data before selecting a product

part number. It is recommended that users also seek out the pertinent

approvals files of the agencies/laboratories and review them to ensure the

product meets the requirements for a given application.

GP/ML/TR Design Features

Among the advances AGASTAT control relays offer over existing designs is

a unique contact operating mechanism. An articulated arm assembly

amplifies the movement of the solenoid core, allowing the use of a short

stroke coil to produce an extremely wide contact gap. The long support

arms used in conventional relays are eliminated. Both current capacity and

shock/vibration tolerance are greatly increased, as well as life expectancy.

Design/Construction

AGASTAT control relays are operated by a moving core electromagnet

whose main gap is at the center of the coil. A shoe is fitted to the core

which overlaps the yoke and further increases the magnetic attraction.

The coil itself is in the form of an elongated cylinder, which provides a

low mean turn length and also assists heat dissipation. Since the

maximum travel of the electromagnet does not provide optimum contacts

movement, an ingenious amplifying device has been designed.

This consists of a W-shaped mechanism, shown in figure 1. When the

center of the W is moved vertically the lower extremities move closer to

each other as can be seen in the illustration. The center of the W mecha-

nism is connected to the moving core of the electromagnet and the two

lower points are connected to the moving contacts.

Two of these mechanisms are placed side-by-side to actuate the four

contacts sets of the relay. The outer arms of the W mechanisms are leaf

springs, manufactured from a flat piece of non-ferrous metal. These outer

arms act as return springs for their corresponding contacts. This provides

each contact with its own separate return spring, making the contacts

independent.

The mechanical amplification of the motion of the electromagnet

permits a greater distance between the contacts, while the high efficiency

of the electromagnet provides a nominal contact force in excess of 100

grams on the normally open contacts.

All the contacts are positioned well away from the cover and are well

ventilated and separated from each other by insulating walls.

The absence of metal-to-metal friction, the symmetrical design of the

contact arrangement and the lack of heavy impacts provides a mechanical

life of 100,000,000 operations.

For use in AC circuits, the relay is supplied with a built-in rectification

circuit, thus retaining the high DC efficiency of the electromagnet. The

current peak on energizing is also eliminated and consequently the relay

can operate with a resistance in series (e.g. for high voltages or for drop-

out by shorting the coil). The use of the rectification circuit offers still

other advantages. The same model can operated at frequencies ranging

from 40 to 400 cycles. Operation of the relay is crisp; even with a low AC

voltage, there is a complete absence of hum and vibration.

The plastic dust cover has two windows through which the iron yoke

protrudes to facilitate cooling and also to allow direct mounting

arrangement of the relay irrespective of the terminals.

Figure 1 – Illustration of Amplification

Features

• Occupies very small panel space

• May be mounted singly, in continuous rows or in groups.

• Available with screw terminal molded socket.

• 4 SPDT contacts.

• Magnetic blowout device option increases DC current carrying ability

approximately ten times for both N.O. and N.C. contacts. In both AC and

DC operation, the addition of the device will normally double the contact

life, due to reduced arcing.

GP/ML Contact Data @ 25°C

Arrangements: 4 Form C (4PDT)

Material: Siver plated.

Ratings: See chart.

Expected Life: Mechanical: 100 million operations.

Electrical: See chart and graph.

Contact Ratings and Expected Life

Power Factor

Number of

Current

or

Electrical

Voltage

(Amps)

Time Constant

Operations

Remarks

540 VAC

3

COS Ø = 0.5

15,000

2 contacts in series

380 VAC

15

Resistive

10,000

2 contacts in parallel

380 VAC

10

Resistive

200,000

380 VAC

3 x 3.3

COS Ø = 0.8

200,000

3hp motor

220 VAC

20

Resistive

20,000

2 contacts in parallel

220 VAC

15

COS Ø = 0.5

20,000

2 contacts in parallel

220 VAC

10

Resistive

400,000

220 VAC

3 x 6

COS Ø = 0.8

200,000

3hp motor

220 VAC

5

1,500,000

Filament lamps

220 VAC

5

Resistive

3,000,000

220 VAC

2.5

COS Ø = 0.25

2,000,000

220 VAC

2

Resistive

15,000,000

220 VAC

1.25

Resistive

30,000,000

120 VDC

1.5

Resistive

20,000,000

with blow-out device

48 VDC

10

Resistive

1,000,000

Load Life Curve

NOTE: Seismic & radiation tested EGP, EML and ETR models

are available. Consult factory for detailed information.