MORE IN DETAIL Shielding kits of Ep-4(0) type

1. Description

Shielding clothing of Ep-4(0) type is intended for use when live working under induced electrostatic and electromagnetic voltage at deactivated trolley lines of rail AC power network, lead wires and feeder disconnectors of railway substations and their bus arrangement as well as on double-circuit aerial power lines and overhead ground-wire cables as an additional protective mean from possible electric injury. The kit may be used when working within electric field area produced by HVL of super high voltage at railway personnel job-site as well as when live working at non-deactivated AC power network.

In addition the kit forms highly shielded circuit around human body and shunts it not allowing current associated with induced voltage, displacement and pulse currents flow through it.

The kit consists of the following elements:

• jacket with sewn-on hood;
• jump suit;
• hood;
• electroshielding knitted gloves;
• gloves of general purpose with partial nitrile cover;
• protective helmet of general purpose;
• leather boots;
• belt with electrician’s bag for instruments.

All kit elements except helmet and belt with instrument bag are made with electroshielding materials and galvanically fixed to each other. Wiring galvanic (diagram) includes high conductivity channels of high conductivity and paired equipotential connection lead (EBL). Paired EBL ensure sufficient thermal withstand capability of electroshielding elements against AC thermal effect.  All circuit elements are made of strip and cloth with silvered tinsel material. EBL contact bonds are ensured by metallic semi-rings and snaps.

            Jacket, semi-coverall, hood and boots are made of flameproof electroshielding material having very high protective properties.

Shielding jacket

            EBL with two semi-snaps for jacket galvanic connection to hood is sewed to jacket collar.

            There are equipotential connection leads (EBL) inside jacket (right and left) and semi-snaps for galvanic connection of jump suit to jacket. EBL are made elongated with warning stripes at the end. If EBL are not bonded to relevant semi-coverall leads than warning stripe is visible and informs user about galvanic disconnection.

            There are two special pockets in front of the jacket. Inside there are conductors sheathed of shielding material with clamps or clips at the ends. They are intended for galvanic connection to electrician room or stick for potential transfer.

            On jacket sleeves there are EBL with connection semi-rings and semi-snaps that ensure galvanic connection of jacket to gloves.

Shielding semi-coverall

            There are paired equipotential connection leads (EBL) in front of semi-coverall (right and left) and semi-snaps for galvanic connection of semi-coverall to jacket.

 Beneath back halves of trousers there are EBL attached with semi-snaps for galvanic connection of semi-coverall to shielding boots.

Hood

Shielding hood put on protective helmet is fully made of shielding material and equipped with two semi-snaps for galvanic connection to jacket.

Shielding gloves

Shielding gloves are made of complex yarn including silvered tinsel, bypass carbonated and high-tensile Kevlar material providing gloves durability.

            Top of a glove in the form of wrist cuff is totally made of tinsel material for galvanic connection of gloves to jacket sleeves. To increase safety of specified connection, gloves are equipped with EBL needed to be passed through semi-rings on jacket sleeves and buttoned up.

            There is knurling from electroshielding plastic applied on gloves palmar part that increase friction coefficient and safety of works on high altitudes without reducing safety of electrical contact of gloves and metallic parts of constructions on site.

Shielding boots

Shielding boots are made of leather with electroshielding sole, inner sole made from shielding material. On the top of boots and lug there are sewed on strips of shielding material and galvanically bonded with inner sole. These strips ensure galvanic fixing with shoe inner sole and semi-coverall with boots. To increase safety of mentioned fixing boots are equipped with EBL with semi-rings and semi-snaps. There are to be passed through semi-rings on semi-coverall trouser legs and buttoned up.

Attention

            All shielding kit elements except hood must be used together and galvanically fixed with each other. Otherwise the kit loses its protective properties.

2. Specifications

Kit shielding factor under 50 Hz, in dB not less than 60 (relative units)

Resistance of shielding clothing in Ohm, not more than 10

Resistance of shielding gloves in Ohm, not more than 30

All kit elements must be galvanically fixed with each other:

• connection lead on jacket collar with bond lead on hood;
• connection leads of jacket with bond leads of semi-coverall;
• connection leads of jacket sleeves with bond leads of gloves;
• connection leads beneath semi-coverall legs with bond leads of boots;

Attention To increase durability of gloves you should put over gloves of general purpose coming with the kit set.

1. Safety requirements

It is strongly prohibited to work under induced voltage during rain. Wet kits abruptly loose protective properties.

When detecting faulty contact bonds, seam fracture or other kit defects all works must be stopped and defective kit or its element should be replaced or repaired.

1. Warranty

Vendor guarantees integrity of protective properties and normal operation of the kit during one year from the day of sale. If during warranty period there are faults detected as well as questions on repair please contact:

9, Karmanitzky per., Moscow 119002 Russia

CJSC “NPO Energoform”, Tel. +7(495) 771 63-75, 956-10-67

Indicating number of defective product and batch number it is supplied from.