ارستر های ترکیبی ، ارستر های مخابراتی

۲ سال پیش

تهران

یوسف هرمان

توضیحات

DS surge protectors are installed as follows, according to their types : - Type 1 or «Heavy duty» : at the origin of the installation, in a separate box or on the main electrical panel, for efficient discharge of high lightning currents. - Type 2 or «Primary» : at the origin of the installation, on the main electrical panel, so as to shunt lightning currents as directly as possible and thereby avoid coupling. - Type 2 (or Type 3) or «Secondary» : on the secondary panel, near the sensitive equipment, to limit ringing and improve the level of protection. Wiring Since lightning surges are essentially common-mode phenomena, DS surge protectors are connected mainly in the common mode (between the active conductors and ground). Some recommendations call for additional differential-mode protection (between phase and neutral). For this case, CITEL proposes special surge protectors (types DUT40, DS210D...) or, when the standards allow, combinations of surge protectors between phases and neutral (differential mode) with a special surge protector (DS100EG, DS40G) between neutral and ground (common mode) : this type of mounting, named «CT2 connection» in IEC 60364 standard, is used in surge protectors such as DS44-230/G. Protection modes Installation DS surge protectors are connected in parallel on the AC network and must be equipped with external fuses (or breakers) for short-circuit protection (see paragraph «Disconnection devices»). - The total length of connection wires to AC network must be lower than 0.5 m in order not to increase the protection level (Up) provided by the SPD. - Wiring is made by screw connections. On some models, a distribution bus can be used. - The protection wire coming from the SPD must be connected to the bonding bar of the electrical panel. Paralleling the protection wire with phases conductors must be avoided. - The cross sectional wire must be 4 mm² minimum for Type 2 SPD’s and 10 mm² for Type 1. - Local earthing resistance must be in compliance with the electrical rules. Further information can be found in IEC 61643-12 standard (selection and application principles for low voltage SPD). Installation example (Type 2 surge protector DS44S) Common mode protection switchboard) DS150 DS250 DUT250VG DUM125 Installation without LPS Type 2 main switchboard DS70R, DS40 DS240,DUT40 33999719 (10 خط) – بازرگانی تیکوا نیرو

ارتباط با: یوسف هرمان

تلفن: ۰۲۱۳۳۱۱۳۵۶۶

تلفن: ۰۲۱۳۳۹۹۹۱۱۵

تلفن: ۰۲۱۳۳۹۹۹۷۱۹

ایمیل: