What products does Hirotronix supply?

Hirotronix supplies industrial automation sensors, machine safety systems, operator controls, level measurement systems, and automation components.

Where is Hirotronix located?

Hirotronix is located in Mississauga, Ontario, Canada.

Does Hirotronix provide worldwide service?

Yes, Hirotronix supplies automation and sensor solutions worldwide.

DOLD SP 9278CT – Current Asymmetry Relay

Brand

DOLD

Part number

SP 9278CT

Order number

0059150

Current Asymmetry Relay

Preventive maintenance
For better productivity
Quicker fault locating
Auxiliary supply and measuring input galvanic separated
With integrated current transformer

Download datasheet (PDF)Ask an engineer

Price and lead time on request — add this part to your quote list and we will reply with pricing and availability.

Brand	DOLD
Housing width	70 mm
Output contacts	2 C/O contacts
Enclosure design	Switch cabinet
Phases	3
Order number	0059150

The current asymmetry relay IP 9278 or SP 9278CT monitors the current symmetry of the 3 phases in three-phase networks. With the integrated current transformers, currents of up to 100 A can be measured. In the event of asymmetry, the changeover relay is switched after the adjustable delay time tv has elapsed. Optionally, the error can be stored.

Features

According to IEC/EN 60255-1
IP 9278, SP 9278: 3-phase
Measuring rangeIP 9278, SP 9278: Up to 15 ASP 9278CT: Up to 100 A
2 changeover contacts
Adjustable asymmetry
Settable time delay
Energized on trip /x0x (output relay activated in case of error)
De-energized on trip /x1x (output relay not activated in case of error)
LED indicators
With auxiliary voltage
Width 70 mm

Technical specifications

1- / 3-phase	3
Auxiliary voltage	AC, AC/DC
Enclosure design	Switch cabinet
Measuring range	AC 4 – 100 A
Operate delay	Yes
Output contacts	2 C/O contacts
Width	70 mm
Type	SP 9278CT

Available variants

Auxiliary voltage	AC/DC 24 V · AC 220 – 240 V
Contact equipping	2 changeover contacts
Measuring range	4 – 50 A · 8 – 100 A
Time delay	0,1 – 20 s
Variant	3-phase current asymmetry relay with feed-through current transformer. Asymmetry setting 5 – 35 % · 3-phase current asymmetry relay with feed-through current transformer. Asymmetry setting 5 – 35 %. With remote reset at terminal X1/X2 · 3-phase current asymmetry relay with feed-through current transformer. Asymmetry setting 10 – 40 % · 3-phase current asymmetry relay with feed-through current transformer. Asymmetry setting 10 – 40 %. With remote reset at terminal X1/X2 · 3-phase current asymmetry relay with feed-through current transformer. Asymmetry setting 5 – 35 %