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Fritz Driescher & Söhne GmbH
Disconnectors, Earthing switches, Fuse bases

Disconnectors, Earthing switches, Fuse bases

Product catalog summary

Overview: The document outlines technical specifications for DRIESCHER indoor disconnectors, fuse bases, and earthing switches, covering rated voltages from 12 kV to 38.5 kV and rated currents from 630 A to 6300 A.

General Specifications: Designed for medium voltage switchgear, these components are type-tested according to EN 62271-102 and are intended for currentless switching. An instruction manual is included for transportation, mounting, and commissioning.

Technical Description: Earthing switches feature an energy storage mechanism for rapid switching, with zinc-plated and chromated base frames. Current-carrying paths are silver-plated, and contacts are made of electrolytic copper. Disconnectors have a continuous operating shaft for flexible drive mounting.

Operating Conditions: Suitable for installation up to 1000 m above sea level, with ambient temperature limits of +40°C peak, +35°C average over 24 hours, and a minimum of -5°C.

3-Pole Indoor Earthing Switches: Available for rated voltages of 12 kV, 24 kV, 36 kV, and 38.5 kV, with short-time current ratings of 20 kA and 31.5 kA. Accessories include signaling switches and motor drives.

3-Pole Indoor Disconnectors: Available for rated voltages of 12 kV, 24 kV, 36 kV, and 38.5 kV, with current ratings from 630 A to 6300 A. Options include motor drives and earthing switches.

1-Pole and 2-Pole Indoor Disconnectors: Designed for specific voltage and current ratings, with optional accessories like signaling switches and motor drives.

Fuse Bases: Designed for high-voltage high-breaking capacity fuses with rated currents up to 200 A, with options for tripping devices.

Specifications: Rated voltages are 12 kV, 24 kV, and 36 kV, with a rated frequency of 50 Hz. Rated power frequency withstand voltage is 28 kV for 12 kV, 50 kV for 24 kV, and 70 kV for 36 kV. Rated impulse withstand voltage is 75 kV for 12 kV, 125 kV for 24 kV, and 180 kV for 36 kV. Rated current is 200 A for all voltage levels.

Dimensions and Weights: Various dimensions and weights are provided for different models, ranging from 3.5 kg to 43.7 kg.

Product Details: Part numbers for single-pole and three-pole fuse bases are provided, along with drawing numbers for reference. Additional brochures are available for more detailed information.

Disconnectors and Earthing Switches: Can be equipped with motor drives, with various actuator types available depending on the mounting type. Further details can be found in catalogue 776 for indoor actuators.

Additional Information: All dimensions, weights, diagrams, and descriptions are non-binding and subject to change without notice. Contact information for ELEKTROTECHNISCHE WERKE FRITZ DRIESCHER & SÖHNE GMBH is provided for further inquiries.

Catalog excerpts

Disconnectors, Earthing switches, Fuse bases-2

The 1-, 2- and 3-pole Disconnectors ITr are appli-cable for a rated voltage range of 12 kV, 24 kV 36 kV, 38,5 kV and a rated current range from 630 A to 6300 A. The rated short time current upto 63 kAfor a duration of 3 s depending on the model has been tested. The 3-pole > Installation can be carried out at heights of up to 1000 m above sea level. At heights above 1000 m the rated insulating level of the switchgear must be corrected accordingly. The switches are designed for normal operating condtions according to IEC 62271-1.According to this the following limiting values applies:Ambient temperature:...

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Disconnectors, Earthing switches, Fuse bases-3

Type ES 12-20 Rated voltageRated frequency Rated short time current Rated duration of short-time circuit Rated peak withstand current Rated short-circuit making current Rated impulse withstand voltage - Phase to Earth Rated power frequency withstand voltage - Phase to Earth Drawing no. Mechanical life Weight approx. U > r 12 kV50 Hz20 kA3 s50 kA 50 kA75 kV 28 kVIT3-096806M119 kg f > r I > k t > k I > p I > ma U > p U > d Drawing for ES 12-20 / Drawing no. IT3-096806 Drawing for ES 12-31,5 / Drawing no. IT3-096809 3 >

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Disconnectors, Earthing switches, Fuse bases-4

ES 24-31,5 Type ES 24-20 24 kV50 Hz31,5 kA3 s80 kA 80 kA125 kV50 kVIT3-096810M127 kg Rated voltageRated frequency Rated short-time current Rated duration of short-time circuit Rated peak withstand current Rated short-circuit making current Rated impulse withstand voltage - Phase to Earth Rated power frequency withstand voltage - Phase to Earth Drawing no. Mechanical life Weight approx. U > r 24 kV50 Hz20 kA3 s50 kA 50 kA125 kV50 kVIT3-096807M124 kg f > r I > k t > k I > p I > ma U > p U > d Drawing for ES 24-20 / Drawing no. IT3-096807 Drawing for ES 24-31,5 / Drawing no. IT3-096810 4 >

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Disconnectors, Earthing switches, Fuse bases-5

ES 36-31,5 ES 36-20 38,5 kV50 Hz31,5 kA3 s80 kA50 kA*180 kV80 kVIT3-104999M146 kg Type ES 36-20 36 kV50 Hz31,5 kA3 s80 kA50 kA*170 kV70 kVIT3-096811M143 kg 38,5 kV50 Hz20 kA3 s50 kA 50 kA180 kV80 kVIT3-103626M143 kg Rated voltageRated frequency Rated short time current Rated duration of short-time current Rated peak withstand current Rated short-circuit making current Rated impulse withstand voltage - Phase to Earth Rated power frequency withstand voltage - Phase to Earth Drawing no. Mechanical life Weight approx. U > r 36 kV50 Hz20 kA3 s50 kA 50 kA170 kV70 kVIT3-096808M140 kg f > r I > k t >...

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Disconnectors, Earthing switches, Fuse bases-6

Type ITr 12-630-20 ITr 12-1600-40 ITr 12-2500-40 ITr 12-4000-50 ITr 12-6300-63 Rated voltageRated frequency Rated current Rated short time current Rated duration of short-time circuit Rated peak withstand current Rated impulse withstand voltage - Phase to Earth - Open Gap Rated power frequency withstand voltage - Phase to Earth - Open Gap Drawing no. Mechanical life Motor drive opt. Earthing switch (see page 3) Weight approx. U > r 12 kV50 Hz630 A20 kA3 s50 kA75 kV85 kV28 kV32 kVIT3-099824M2opt.ES 12-2020 kg 12 kV50 Hz1600 A40 kA3 s100 kA75 kV85 kV28 kV32 kVIT3-102832M2opt.ES 12-31,532 kg 12...

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Disconnectors, Earthing switches, Fuse bases-7

Drawing for ITr 12-1600-40 / Drawing no. IT3-102832 Drawing for ITr 12-2500-40 / Drawing no. IT3-100813 7 >

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Disconnectors, Earthing switches, Fuse bases-8

Drawing for ITr 12-4000-50 / Drawing no. IT3-103229 Drawing for ITr 12-6300-63 / Drawing no. IT3-096072 8 >

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Disconnectors, Earthing switches, Fuse bases-9

Type ITr 24-630-20 ITr 24-1600-31,5 ITr 24-2500-40 ITr 24-4000-50 ITr 24-6300-63 Rated voltageRated frequency Rated current Rated short time current Rated duration of short-time current Rated peak withstand current Rated impulse withstand voltage - Phase to Earth - Across the Open Gap Rated power frequency withstand voltage - Phase to Earth - Across the Open Gap Drawing no. Mechanical life Motor drive opt. Earthing switch (see site 4) Weight approx. U > r 24 kV50 Hz630 A20 kA3 s50 kA125 kV145 kV50 kV60 kVIT3-099825M2opt.ES 24-2031 kg 24 kV50 Hz1600 A31,5 kA3 s80 kA125 kV145 kV50 kV60 kVIT3-099847M2opt.ES...

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Disconnectors, Earthing switches, Fuse bases-10

Drawing for ITr 24-1600-31,5 / Drawing no. IT3-099847 Drawing for ITr 24-2500-40 / Drawing no. IT3-100812 10 >

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Disconnectors, Earthing switches, Fuse bases-11

Drawing for ITr 24-4000-50 / Drawing no. IT3-104607 Drawing for ITr 24-6300-63 / Drawing no. IT3-099510 11 >

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Disconnectors, Earthing switches, Fuse bases-12

Type ITr 36-630-20 ITr 36-1600-40 ITr 36-2500-50 Rated voltageRated frequency Rated current Rated short time current Rated duration of short-time current Rated peak withstand current Rated impulse withstand voltage - Phase to Earth - Across the Open Gap Rated power frequency withstand voltage - Phase to Earth - Across the Open Gap Drawing no. Mechanical life Motor drive opt. Earthing switch (see site 5) Weight approx. U > r 36 kV50 Hz630 A20 kA3 s50 kA170 kV195 kV70 kV80 kVIT3-099826M2opt.ES 36-2040 kg 36 kV50 Hz1600 A40 kA3 s100 kA170 kV195 kV70 kV80 kVIT3-102811M2opt.ES36-31,5*63 kg 36 kV50...

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Disconnectors, Earthing switches, Fuse bases-13

Drawing for ITr 36-1600-40 / Drawing no. IT3-102811 Drawing for ITr 36-2500-50 / Drawing no. IT3-101187 13 >

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Disconnectors, Earthing switches, Fuse bases-14

Type ITr 38,5-630-20 ITr 38,5-1600-40 Rated voltageRated frequency Rated current Rated short time current Rated duration of short-time current Rated peak withstand current Rated impulse withstand voltage - Phase to Earth - Across the Open Gap Rated power frequency withstand voltage - Phase to Earth - Across the Open Gap Drawing no. Mechanical life Motor drive opt. Earthing switch (see site 5) Weight approx. U > r 38,5 kV50 Hz630 A20 kA3 s50 kA180 kV210 kV80 kV90 kVIT3-099827M2opt.ES 38,5-2043 kg 38,5 kV50 Hz1600 A40 kA3 s100 kA180 kV210 kV80 kV90 kVIT3-104596M2opt.ES 38,5- 31,5*66 kg f > r I...

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Disconnectors, Earthing switches, Fuse bases-18

ITr 24-630-20-2 Type ITr 12-630-20-2 24 kV50 Hz630 A20 kA3 s50 kA125 kV145 kV50 kV60 kVIT3-104987M2opt. opt.45 kg Rated voltageRated frequency Rated current Rated short time current Rated duration of short-time current Rated peak withstand current Rated impulse withstand voltage - Phase to Earth - Across the Open Gap Rated power frequency withstand voltage - Phase to Earth - Across the Open Gap Drawing no. Mechanical life Motor drive Earthing switch Weight approx. (without Motor drive) U > r 12 kV50 Hz630 A20 kA3 s50 kA75 kV85 kV28 kV32 kVIT3-100427M2opt. opt.30 kg f > r I > r I > k t > k I >...

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