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Hybrid Power Relay (HPR)

1630

5

Functional description

The HPR is voltage level controlled. This means, it will be programmed

ex-factory how it should work: either like a signal-controlled relay,

practically as a monostable function, or with an impulse like a bistable

relay and even with a defined voltage level.

The relay will then be switched on or off after a defined time.

Measurement of the input signal is analog. This allows checking the

system voltage. So for instance if the battery voltage falls below a certain

programmed level (e.g. 5 V), the relay can open the main contact

(automatic load shed). As soon as the level rises again (e.g. > 16 V) it

will be switched back on.

Activation:

There are two ways of activating the relay: level or pulse. The level

activation requires a High Signal being applied to the IN+ terminal so

that the relay switches on the load. The Low Signal disconnects the

load. With the pulse activation the relay alternately switches the load

on and off with each pulse.

Filter function in the activation:

This function serves for tolerating disturbances on the activation line.

Incidental peaks or contact chattering will then not cause inadvertent

connection/disconnection of the load. The value configured for this

function determines how long a control signal has to be applied

permanently to the control input until it will be recognised as such.

Should there be dips in the control signal during the configured time,

it will not be recognised as activation.

Information: Inadvertent activation can thus be prevented.

Low voltage detection:

This function serves for undervoltage protection. If the volt-

the load will be disconnected. If the voltage rises again, the

relay can be switched on again either automatically at the

re-triggered. This would for instance prevent inadvertent start-up of a

machine as requested by the current machinery Directive. Low voltage

detection is via internal tap (SENSE) at load contact 88.

Behaviour in the event of reset of the operating voltage will be configured.

Automatic ON or OFF

Caution: If e.g. an extreme discharge of the battery has the system

voltage fall very quickly below the critical value, the electronic circuitry

does not have enough time and energy to energize the relay. We rec-

ommend to set the status to a safe condition as soon as the operating

voltage is restored, i.e. to the OFF condition.

Activation

> 16 V

CTRL/INIT

> 5 V

T delayed

OFF

T delayed

ON

ON

OFF

88/88a

Level activation with filter function

Pulse activation with filter function

IN

T

filter

T

filter

T

filter

T

filter

T

filter

IN

LOAD

LOAD

Level activation

Pulse activation

IN

IN

LOAD

LOAD

Low voltage detection

U

B

U

ON

U

OFF

LOAD