BQP - Single Phase Supply Monitoring Relay Selection:

BQP - Single Phase Supply Monitoring Relay Selection:

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Application: The BQP range of Supply Monitoring Relay is designed to monitor a single phase supply and offers a choice across the family of individual over-voltage or under-voltage or a combined over and under-voltage conditions.

Description:

In the BQP family of supply monitoring relays there are a total of six models to choose from all incorporaring a fixed trip delay time:
•2 models monitor an over-voltage condition.
•2 models monitor an under-voltage condition.
•2 models monitor an over & under-voltage condition


Alternative:

A. for an enclosed version see the BQE family of supply monitoring relay's




Selection:

For the product to suit your application please see the selection chart below or contact sales:
Use Filter menus to browse products - 1 Filter(s) Set
ProdRefSupply VoltageU/V Trip LevelTrip Delay TimeopenTimer TypeRelay ContactsSeparate UVEnclosure Typeenclosure typeO/V Trip Level
BQP1102add to basket240VacN/A0.5 secsFixed1 pole C/ONo1100-130%
BQP1202add to basket240Vac70-100%0.5 secsFixed1 pole C/ONo1N/A
BQP1402add to basket240Vac70-100%0.5 secsFixed2 pole C/ONo1N/A
BQP1502add to basket240VacN/A0.5 secsFixed2 pole C/ONo1100-130%
BQP1602add to basket240Vac70-100%0.5 secsFixed2 pole C/OYes1100-120%
BQP1702add to basket240Vac70-100%0.5-30 secsStandard2 pole C/OYes1100-120%


Trip Delay Timer
Where fitted the ‘Trip Delay Timer’ will inhibit the output contacts from releasing immediately a fault is detected.
The trip delay time is adjustable up to either 10 or 30 seconds depending on the model and will be either a ‘Standard’ delay or a ‘True’ delay type.
The 'Standard' delay type will require around 50% nominal supply voltage to be maintained for its operation, in the case of a total loss of power the unit
will trip with a minimal delay of approximately 0.5 seconds. This type of timer will allow the unit to ride through a short term voltage dip but not a total
power loss.
The 'True' delay timer is not dependent on the supply voltage for its operation. The timing function will be available in the case of either a partial or total
supply failure. This type of timer will allow the unit to ride through either a short term voltage dip or a total loss of power lasting up to 30 seconds.
Power On Delay Timer
Where fitted, the ‘Power On Delay Timer’ will delay the output contacts from energising immediately the supply voltage is applied to the unit for a period
of up to 30 seconds.
The supply voltage will have to satisfy the conditions set by the supply monitoring relay for a healthy supply continuously for the ‘Power On Delay’ timing
period before the output contacts will energise.
If the unit detects a fault and releases the output contacts the supply voltage will once again have to satisfy the requirements of a healthy supply continuously
for the ‘Power On Delay’ timing period before the output contacts will re-energise.