Yes, our units are supplied with a flange for direct connection onto an ESI transformer.

The height from the floor to the centre line of the T-off bushings can be set at 1100 mm, 1320 mm or 1402 mm. Other heights are available on request.

Ensure that the selector is in the centre position with the access shutter closed. If the problem persists contact our After Sales and Service Department for advice.

Check that the star bar is fully closed; if not the interlock will prevent the shutter from opening. If the problem persists contact our After Sales and Service Department for advice.

This feature is available on our VRN6a, VRE6a and VCE6a units.

We do not recommend our units are operated with the gauge in the red area as the SF6 may have become contaminated. However, our units contain a vacuum circuit breaker and will therefore operate safely under fault conditions. If the pressure gauge on you unit is in the red area please contact our After Sales and Service Department to arrange a site visit.

This is a viscous damping fluid and is normal. The air gap is to allow the liquid to expand at high temperatures.

The gauge on our unit measures gas pressure. This will naturally fluctuate as the ambient temperature changes. As long as the needle is not in the red area this is perfectly normal.

Our cable boxes are designed so that they can be inverted for top entry.

We have a variety of gland plates which can be fitted to our units; single hole, 3 hole or blank. They are manufactured from either steel, brass or aluminium depending on the site requirements.

The bushings for each ring switch are located either side of the unit. Both sets of bushings are type "C" with in-line bolted connections M16 threaded in accordance with EN50181. The T-off bushings are located at the rear of the unit and are in-line bolted connections M12 threaded. All tee-off bushings are fitted with white stress relief collars which must not be removed.

The torque settings are 75 Nm for the ring switches (M16 bolt) and 35 Nm on the T-Off (M12). We also recommend that a minimum of 1.5 x thread is screwed into the bushing (eg screw 18mm into a M12 hole).

Our units can accept a 300 mm2 three core cable or 3 x 500 mm2 single core cables in each cable box.

We can supply a variety of glands with our equipment. These include plain tube, brass wiping, heat shrink and compression glands. Please contact us to discuss your requirements.

We can supply a variety of glands with our equipment. These include plain tube, brass wiping, heat shrink and compression glands. Please contact us to discuss your requirements.

For 11 kV applications we would generally recommend the following:
a) < 200 kVA: SFRMU with HV fuses
b) 200 kVA � 1600 kVA: VRN2a with TLF
c) >1600 kVA: VRN6a with relay

For specific advice please contact our Technical Department to discuss your requirements.

Check that the settings are enabled correctly in the relay. Make sure the injected current is correct according to the IEC curves. If necessary isolate the phase sensing element under test in the relay. For advice on setting the relay please contact our applications department.

The following table gives fuse ratings for most common transformers. For other ratings please contact our technical department for advice.

We can supply trip coils to operate between 24 v " 110 v DC and 110 v " 240 v AC. If you are unsure which of these options you have fitted, please contact our After Sales and Service department with the serial number of your unit and they will be able to confirm the specification.

Our units can accept a 300 mm2 three core cable or 3 x 500 mm2 single core cables in each cable box.

We have a variety of gland plates which can be fitted to our units; single hole, 3 hole or blank. They are manufactured from either steel, brass or aluminium depending on the site requirements.

Most units supplied by Lucy Switchgear are fitted with TLF or self-powered relay protection; in these cases no auxiliary supply is required. If you are unsure which of these options you have fitted, please contact our After Sales and Service department with the serial number of your unit and they will be able to confirm the specification.

We can supply trip coils to operate between 24 v " 110 v DC and 110 v " 240 v AC. If you are unsure which of these options you have fitted, please contact our After Sales and Service department with the serial number of your unit and they will be able to confirm the specification.

The torque settings are 75 Nm for the ring switches (M16 bolt) and 35 Nm on the T-Off (M12). We also recommend that a minimum of 1.5 x thread is screwed into the bushing (eg screw 18mm into a M12 hole).