Oltc Online Oil Filter Plant on Load Tap Changer Transformer Switch

General

1.1 Type ZXJY series online oil filter plant for on-load tap changer is designed by Huaming’s R&D team with

patented technology. This device is mainly used for circulating and filtering of on-load tap changer insulating oil.

It can remove free carbon and metal debris, as well as reduce water content in the tap changer oil during

normal operation of transformer system ensuring the breakdown voltage and service life of the oil, improving

the safety and reliability of on-load tap changer, which consequently extends the maintenance intervals.

1.2 There are two models of ZXJY series oil filter plant:
1.2.1 Type ZXJY-1: Mechanical and electrical section are located in the same cabinet.
1.2.2 Type ZXJY-3: Three sets of oil-filter plants can be controlled by one single control module,while each of
the oil-filter plants can be commissioned separately and put into parallel operation.

1.3 Type ZXJY-1 can be mounted either on the transformer’s tank side (referred to as “wall mounting type”), or
on the ground (referred to as “ground type”). For type ZXJY-3, ground type is recommended.

1.4 For those projects that the transformer has been in service, and need to add the oil-filter plant (referred to
as “retrofit project”), please specify the installation method. In case of “wall mounting type” installation, we will
provide common steel bracket (see appendix 6a) due to the variation of site condition and transformer tank
shape. In case of “ground type” installation, we will be able to provide stainless steel supporting bracket (see
appendix 6b) with extra charge.

Product feature
2.1 Main oil channel is designed with a compact integrated plate style, eliminating pipe connection,thus reduce
the sealing area. All the main sealing sections are designed with double sealing style to increase the sealing
factor.

2.2 SIEMENS LOGO control unit is adopted in type ZXJY with many functions such as manual operation,
automatic operation, timing starting, operation time setting, etc., and also with other functions such as operation
time recording, maintenance alarming, etc. In addition, type ZXJY-1 and ZXJY-3 are equipped with thermostat. If
temperature goes below 5ºC or humidity reaches 80%, heater begins to work, while if temperature reaches to
45ºC, fan starts to operate; in this way the device can be normally operated in various environments to realize
automatic operation without supervision of operator.

2.3 This type of plant is fitted with two-step filtering process, i.e. first to get rid of debris such as free carton etc,
then to remove moisture from inside. Filtering core in the process is ordered particularly from USA according to
OLTC’s unique features. Currently, the plant is equipped with 3μm filtering core and alluminium-alloy made-in
chamber as standard. Provided that higher accuracy filtering core in 1μm and stainless steel made-in chamber
are required, please specify during order.

2.4 Standard plug connectors are provided with the oil-filter plant, such as: 380 V working power supply input
connector; monitoring signal output connector; input connector of operation command of on-load tap changer.
Length of the cable can be specified according to customer’s requirement.
During on-site operation, it is very easy to connect the cable plug after proper tightening. (Details of each
connection terminal can be found in “operation instructions”)
 

Main technical data

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