Heavy weave herringbone fashion cotton tape without tracer commercial quality – selfedge class A 105°C
APPLICATION : Mainly in transformer industry
|GD219||19mm x 25m x 0,38mm thick|
|GD225||25mm x 25m x 0,38mm thick|
|GD235||35mm x 25m x 0,38mm thick|
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ISOSEAL ® MF 0611, MF ME 2411
ISOSEAL ® MF 0611 consists of a impregnated mixed polyester-glass-fabric combined with a thermo-shrinkable PET-film. ISOSEAL ® MF ME 2411 additionally contains a metallic salt (zincnaphtenate) suitable for epoxy-anhydride systems. During impregnation the resin can penetrate through the layers of the ISOSEAL ® MF tape into the mainwall insulation. During curing process ISOSEAL ® MF will shrink under temperature and prevent resin from draining out and give some pressure to the mainwall of the overhang.
ISOSEAL ® MF is used as final above the porous tapes in the production of VPI-insulation windings to protect the overhang part of low and high voltage coils and bars against ambient stress.
maximum width 1080 mm
Tapes from 10 mm width upward
ISOSEAL ® MF 0611 can be stored 2 years under normal conditions (20 °C; 50% humidity).
ISOSEAL ® MF 2411 can be stored 12 months under normal conditions (20 °C; 50% humidity).
ISOSEAL ® MF 0611 and MF 2411 will shrink and seal the overhang during normal curing of coils and bars after the VPI process.
EGSB ® 2709 T
EGSB ® 2709 T consists of polyester-fabric, impregnated with a silicon carbide resin mixture in B-stage. EGSB ® 2709 T is a flexible semi cured tape with a defined resistance characteristic, depending on the voltage due to the silicon carbide. The improved adhesive properties guarantee a complete sealing between the layers of EGSB ® 2709 T. EGSB ® 2709 T has got a slightly tackier surface then conventional EGSB ® 2709 T. The final properties are achieved when the tape has been cured and the layers bond together.
EGSB ® 2709 T is used for insulating systems in VPI technology as voltage stress grading at the overhang part of coils and bars of high voltage machines. The performance of EGSB ® 2709 T is highly increased by using ISOSEAL ® MF 0611 (MF ME 2400) for VPI system. Sealing with SIOSEAL ® MF 611 (MF ME 2411) is recommended.
Format Tapes 20 mm wide Other widths are available on request.
Minimum 6 months at 20 °C
Minimum 12 months at 5 °C
Optimum curing Conditions: 2 hours at 160 °C
Good contact to the outer corona protection tapes (CONTAFEL®) has to be ensured by an overlap of at least 10 mm. Length of EGSB ® covering in cm: =Test voltage (kV) divided by 2 – 3 (+ overlapped length with corona protective covering)
½-lapped taping is recommended.