IEEE C37.100.1-2007 pdf download IEEE Standard of Common Requirements for High Voltage Power Switchgear Rated Above 1000 V
3. Definitions
For the purposes of this standard, the following terms and definitions apply. IEEE Std C37.100 (B37)should be referenced for terms not defined in this clause. For terms that are not listed in IEEE Std C37.100B37l, users should refer to The Authoritative Dictionary ofIEEE Standards Terms B24].
An asterisk (*) indicates that at the time this standard was approved, there were no correspondingdefinitions in IEEE Std C37.100 B37
NOTE-The IEC counterpart to IEEE Std C37.100 B37] is the lEC 60050 series of standards (Bl], (B2), (B3),B4.
B5].
3.1 disconnector: A mechanical switching device that provides, in the open position, an isolating distancein accordance with specified requirements.(See IEC 60050-441:1984 B31)
NOTE-A disconnector is capable of opening and closing a circuit when either negligible current is broken or made, orwhen no significant change in the voltage across the terminals of each of the poles of the disconnector occurs. It is alsocapable of carying currents under normal conditions and carrying for a specified time currents under abnormalconditions such as those of short circuit.
3.2 IP coding*: A coding system to indicate the degrees of protection provided by an enclosure againstaccess to hazardous parts, ingress of solid foreign objects, ingress of water, and to give additionalinformation in connection with such protection, (See 3.4 of ANSI/EC 60529:2003.)
3.3 isolating distance* (of a pole of a mechanical switching device): The clearance between the contacts.or any conductive parts connected thereto, of a pole of a mechanical switching device in the open positionmeeting the functional requirements specified for disconnectors, Clearance is the shortest path between theconductive parts.
3.4 non-sustained disruptive discharge (NSDD)*: Disruptive discharge associated with currentinterruption, that does not result in the resumption of power frequency current or, in the case of capacitivecurrent interruption does not result in current in the main load circuit.
3.5 vacuum interrupter*: A switching component in which high-voltage electrical contacts operate in ahighly evacuated, hermetically sealed environment.
NOTE–Refer to Annex H for additional information about terms used in this standard.
4. Ratings
The common ratings of switchgear, including their operating devices and auxiliary equipment, should beselected from the following:
a) Rated maximum voltage (V) or (U r ) 18
b) Rated insulation level (Ud), (Us), (Up)
c) Rated power frequency (f r )
d) Rated continuous current (I r )
e) Rated short-time withstand current (I k )
f) Rated peak withstand current (I p )
g) Rated duration of short circuit (t k )
h) Rated supply voltage of closing and opening devices and of auxiliary circuits (U a )
i) Rated supply frequency of closing and opening devices and of auxiliary circuits
j) Rated pressure of compressed gas supply for insulation or operation
NOTE—Other rated characteristics may be necessary and should be specified in the relevant equipment standards.
IEEE C37.100.1-2007 pdf download
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