The SB6100 detects leakage current and interrupts the circuit, significantly reducing or eliminating the shock potential. One key part of the additional safety features is that the SB6100 also monitors the ground wire from the SB6100 to the load for continuity. アース線の切断あるいは弛みが生じた場合、SB6100 がアラームを発し、電力を遮断します。
The combination of a wet environment, stainless steel equipment and conductive surfaces creates a situation where shock is more likely to occur. Equipment such as fryers, mixing equipment and electric ranges must be movable to meet sanitation standards, requiring plugs to be used. Flexible cords are prone to wear and tear over time, and worn insulation increases a worker's risk for electrical shock. The National Electrical Code (NEC) 2017 version and later, now requires using a ground-fault circuit interrupter (GFCI), like the Littelfuse SB5000 Shock Block, for 208-volt three-phase applications up to 100 A. Its use on this equipment protects workers from electric shock and ensures both NEC, and health and sanitation code compliance.
The NEC 210.8[B] code requires GFCI protection for any plug and cord equipment that is 208 V, 3-phase and 100 A or below. Plug-in equipment such as dryers, mixers, cutting equipment, and conveyers fall into this category and must be protected with a GFCI. The Littelfuse SB5000 will meet this code requirement for your facility, but the protection doesn't stop at 208 V. The Littelfuse Shock Block is also offered as Special Purpose GFCI protection all the way up to 600 V-personnel protection for all situations.
Special purpose GFCIs are required in industrial facilities and construction to meet the requirements defined by UL 943C. クラス C GFCI はライン間電圧が 480 V 以下でトリップレベル 20 mA の三相システムで使用することを意図しており、クラス D GFCI は 600 V システムでの使用を想定しています。工業用 Shock Block は自動セルフテスト機能付きで、プログラマブルコンポーネントにおける UL1998 ソフトウェア規格に準拠しています。
Shock Block ground-fault protection has been recognized for years for its award-winning technology. Winner of an Academy Award® for Scientific and Engineering Achievement, the portable, rental Shock Block is designed to protect actors, film-crew and equipment on sets where water or moisture can create electrical hazards.
A municipal water utility company, that supplies water to more than three million residents, wanted to protect its workers from shock hazards. The facility had two tanks the size of Olympic swimming pools containing 7-10 hp submersible pumps running on 600 V. Once or twice a year the tanks must be cleaned by hand, and workers enter while the water is still present and the pumps are running. The solution was the Littelfuse Industrial Shock-Block™ SB6100 EGFPD. 電力会社は、各ポンプに電力を供給するモーター制御センターに EGFPD を設置しました。 The EGFPDs operate like an industrial ground-fault circuit interrupter. If a device senses a ground fault above a trip setting, it will open the circuit very quickly to protect workers from shock.
溶液採掘には、一定の水の供給が必要です。 A large solution mining company has pump stations located near the water supply to pump the water in for processing. The water needs to be filtered before it is pumped to the mine so there is a filter screening the water intake.2つ目のフィルターがポンプ場内に取り付けられていますが、それでも石、砂、破片がポンプ場に入り込みます。通常、年に一度、従業員は水中ポンプの助けを借りてサンプから破片を取り除く必要があります。 Having a submersible pump running while the employee is cleaning leaves them at risk for electrical shock. The Industrial Shock-Block™ was the solution. They mounted the EGFPD on the wall inside the pumping station along the river bank. Because the Industrial Shock-Block™ is lightweight, the wall-mount installation among the electrical cabinets worked for this application. Now when a worker goes into the pumping station to clean the sump, they will be protected by the Industrial Shock-Block™.
米国西部のレンガ製造工場では、住宅や商業用のレンガ、その他の建築材料として、粘土を加工しています。 Part of this process involves wet saws that operate at high voltage (480 V) and it is a wet process. The company managers wanted to make sure operators were safe from electrical ground faults.工場の電気技師は、ユタ州ソルトレイクシティにあるリテルヒューズの販売代理店に懸念事項について相談しました。販売代理店の担当者は、リテルヒューズの機器漏電保護デバイス (EGFPD) の使用を提案しました。 The Industrial Shock-Block™ SB6100 was installed between the motor control center and the face-cut saws on a manufacturing line built in the 80s.そして実験してみたところ、30mAが厄介なトリップを防ぐ最低設定であることが分かりました。 If the device senses a ground fault at or above that threshold, it opens the circuit within 20 ms - fast enough to prevent worker injury or death from dangerous electrical shock.
