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Effective 2/2/2001

Page 28

I.L. 70C1037H03

3. The Short Delay Current Setting is a multiple of (

r):

Short Delay Current Setting = SD x (

r) = SD x [LD x

(

n)] (see Section 4.4).

CAUTION

BEFORE YOU FIT THE RATING PLUG INTO THE TRIP

UNIT, BE SURE TO CHECK THAT EACH BREAKER

POLE SENSOR RATING MATCHES THAT PRINTED ON

THE RATING PLUG DOOR. INSTALLING A RATING

PLUG THAT DOES NOT MATCH THE SENSOR RATING

CAN PRODUCE SERIOUS MISCOORDINATION AND/OR
FAILURE OF THE PROTECTION SYSTEM.

NOTE:

Rating plugs from Digitrip models 210, 500, or 510

CANNOT

be used with 520 family model Trip Units.

8.0 RECORD KEEPING

Use the forms shown in Figures 8.1 and 8.2 for record

keeping. Fill in these forms, giving the indicated reference

information and initial time-current trip function settings. If

desired, make a copy of the form and attach it to the

interior of the breaker cell door or another visible location.

Figure 8.3 provides a place for recording test data and

actual trip values.

Ideally, sheets of this type should be used and maintained

by those personnel in the user’s organization that have the

responsibility for protection equipment.

9.0 REFERENCES

9.1 Magnum and Magnum DS Circuit Breakers

I.B. 2C12060

Magnum DS Breaker Instructions

I.B. 2C13060

Magnum I. Breaker Instructions

4A36346

Zone Interlocking Application with Non-

Magnum Breakers

9.2 Time-Current Curves

The Time-Current Curves are listed below for particular trip
unit models. All protection function time-current settings
should be made following the recommendations of the
specifying engineer in charge of the installation.

70C1009

Digitrip 220 (LI) Curve

70C1006

Digitrip 520 (LS) Curve

70C1007

Digitrip 520 (I) Curve

70C1008

Digitrip 520 (G) Curve

Courtesy of NationalSwitchgear.com

Содержание Digitrip 220

Страница 1: ...2 Remote Master Computer 23 4 9 3 INCOM Network Interconnections 23 5 0 Test Procedures 24 5 1 General 24 5 2 When to Test 24 5 3 Functional Field Testing 24 5 3 1 Field Test Kit 24 5 3 2 Handheld Fun...

Страница 2: ...lled in the breaker and can be replaced or upgraded in the field by the customer This instruction book specifically covers the application of Digitrip Trip Units see Figure 1 1 installed in Magnum and...

Страница 3: ...s Yes Long Long Delay Setting Delay Long Delay Time I2t at 6 x Ir Protection Long Delay Thermal Memory Fixed 1 x In Fixed 10 seconds Yes 0 4 1 0 x In 2 24 Seconds Yes 0 4 1 0 x In 2 24 Seconds Yes 0 4...

Страница 4: ...used on 3 pole or 4 pole circuit breakers for the protection of the neutral circuit Only these four models can provide neutral protection although models MLSIA MLSIG MWLSIG CLSIA CLSIG and CWLSIG and...

Страница 5: ...r to release the rating plug from the trip unit To remove the trip unit from the circuit breaker deflect the spring clip to release the unit from the steel mounting plate Pull the unit to disengage th...

Страница 6: ...o that the 520M 520Mi or 520MC 520MCi liquid crystal display LCD will be functional even when the circuit breaker has no load A Digitrip 520M or 520MC tripunit without auxiliary power will not display...

Страница 7: ...greater than this value will be shown as HI Pushing the Reset pushbutton will clear this data Also related to the phase value after a trip event are four dashes This message means that the microproces...

Страница 8: ...RUCTIONS PROVIDED Figure 2 1 Tripping Circuit for a Typical Magnum Breaker Partial 2 2 Low Energy Trip Actuator The mechanical force required to initiate the tripping action of a Magnum Circuit Breake...

Страница 9: ...ON IF THE SENSOR CONNECTIONS ARE INCORRECT A NUISANCE TRIP MAY OCCUR ALWAYS OBSERVE THE POLARITY MARKINGS ON THE INSTALLATION DRAW INGS TO INSURE CORRECT GROUND FAULT EQUIP MENT PERFORMANCE CONDUCT FI...

Страница 10: ...tized by the CHip Cutler Hammer Integrated Processor chip The microcomputer continually digitizes these signals This data is used to calculate true RMS current values which are then continually compar...

Страница 11: ...K1 4 K1 3 10 1 10 1 AUX CT K2 9 K2 1 K2 7 B 5 B 7 K1 5 K1 2 Black Trip Actuator LB LC LA K1 6 K1 7 K1 8 K1 9 1 1 1 Source Load K2 8 K2 9 B 4 B 6 20 1 AUX CTs 20 1 K1 3 K2 7 B 5 B 7 K1 2 Black Trip Act...

Страница 12: ...e ground fault via element R5 Do not jumper on secondary contacts B 6 B 7 This will defeat all ground fault protection in application for 4 pole breaker Ground fault style trip unit is installed 3 2 1...

Страница 13: ...5 are available on4 pole breakers Do not jumper B 6 B 7 in 4 pole applications Source l A I B1 LC1 Lb2 Lc2 I I I II I Black K1 2 Digitrip 520 with GF TriP 7 Actuator K1 3 I R 20 1 w X K1 9 2000 1 2000...

Страница 14: ...Wiring needed at system level is shown as a dotted line Capital letters represent primary current Lowercase letters represent secondary current The three breakers M1 M2 and T must all have the same b...

Страница 15: ...t Release is enabled only for the first two cycles following an initial circuit breaker closing operation The Making Current Release will trip the circuit breaker instantaneously and flash the Instant...

Страница 16: ...Release Circuitry See Section 3 3 Trip Actuator LED Pulse Circuit Battery 3V Ground Alarm Power Supply Optional for 520M Required for 520MC FET Trip See Section 1 2 Trip LED Rating Plug Integrated Pr...

Страница 17: ...ective 2 2 2001 Page 17 I L 70C1037H03 Figure 3 2 1 Digitrip 220 LI Figure 3 2 2 Digitrip 520 LSI Figure 3 2 3 Digitrip 520 LSIG Figure 3 2 4 Digitrip 520i WLSIG F T N Courtesy of NationalSwitchgear c...

Страница 18: ...e 2 2 2001 Page 18 I L 70C1037H03 Figure 3 3 4 Digitrip 520Mi MWLSIG Figure 3 3 3 Digitrip 520M MLSIG Figure 3 3 1 Digitrip 520M MLSI Figure 3 3 2 Digitrip 520M MLSIA F T N Courtesy of NationalSwitchg...

Страница 19: ...Riliiqj PS Shall ft fill Dally 8 l Srtflni L 4 IlfiiA 1 1 Haspmi 9 rnirsTiil 1Rcp llSd I 6 P jnsmi fi II I 3II I QR II Cutler Hammer Digitrip 520MC Cutler Hammer Digitrip 520MCJ 1 14 Msmal PH5 Braird...

Страница 20: ...eration set each trip unit protection setting to the values specified by the engineer responsible for the installation The number of settings that must be made is determined by the type of protection...

Страница 21: ...There are 8 available Short Delay Current Settings as illustrated in Figure 4 4 Seven settings are in the range from 2 to 10 times Ir REMEMBER Ir is the Long Delay Current Setting The maximum value M...

Страница 22: ...und Fault Time Delay Settings 4 9 INCOM Digitrip 520MC Models only INCOM communication to a host computer or a BIM is possible with the Digitrip 520MC unit The address range is 001 through 999 The fac...

Страница 23: ...e it and display it in a useful manner Following an over current trip operation the sequence of coded data varies slightly The cause of trip the value the phase or ground current responsible for the t...

Страница 24: ...agnum Test Kit Adapter 8779C02G04 can be used to test the trip unit and breaker 5 0 TEST PROCEDURES 5 1 General WARNING DO NOT ATTEMPT TO INSTALL TEST OR PERFORM MAINTENANCE ON EQUIPMENT WHILE IT IS E...

Страница 25: ...and serve to power up the display on the 520M trip unit LED s A and B function to represent sufficient battery voltage from both the single Lithium cell and the six Alkaline batteries respectively If...

Страница 26: ...ker should not trip and the alarm indicator if one is supplied should not operate Repeat the test using the other two combinations of breaker phases See Figure 5 3 or through a breaker pole and the ne...

Страница 27: ...ILL NOT HARM EITHER THE TRIP UNIT OR THE BATTERY BUT WILL DEFEAT THE FUNCTION OF THE BATTERY The replacement battery should be the same type as that already in the trip unit or an equivalent Acceptabl...

Страница 28: ...f desired make a copy of the form and attach it to the interior of the breaker cell door or another visible location Figure 8 3 provides a place for recording test data and actual trip values Ideally...

Страница 29: ...NGS Circuit No Address Breaker Shop Order Reference PER UNIT MULTIPLIERS Rating Plug Amperes In Ir Continuous Ampere Rating LDS x In Trip Function Per Unit Setting Multi Ampere Equivalent Setting Time...

Страница 30: ...No Address Breaker Shop Order Reference Settings Reference Trip Function Orig 0 Rev 1 Rev 2 Rev 3 Instantaneous Long Delay Setting Long Delay Time Short Setting Short Time Ground Fault Setting Ground...

Страница 31: ...GROUND FAULT TEST RECORD FORM Ground Fault Test Record should be retained by those in charge of the building s electrical installation in order to be available to the authority having jurisdiction Te...

Страница 32: ...the feeder trip unit the feeder will send a restraint interlocking signal to Z1 Main and feeder trip units will begin to time out and in the event that the branch breaker does not clear the fault the...

Страница 33: ...t and last zone is 250 feet 76m A3 A maximum of 20 breakers may be connected in parallel in one zone Main 3200 A Zone 1 C zo 0 5 Sec 1200 A Zl Feeder 1 1600 A Zone Zone 1 2 C G 0 3 Sec 400 A ZO Zl Leg...

Страница 34: ...ere actually is a ground fault Find location of the fault On 4 wire residual systems the neutral current sensor may not have the correct ratio or be properly connected Check connections at terminals B...

Страница 35: ...to Sections 1 6 and 1 6 1 Wrong Address Check Address See Section 4 9 Check for Aux Power A14 A15 No Power Check Status LED and Transmit LED See Figure 1 1 and Refer to Section 1 6 Check Communication...

Страница 36: ...1 WHT ACTA BRN 44 K1 S 4 DOORSWnCH WHENREQ A1 R 1 CSA K1 8 AC MOTCR 4A V 4 4 OB 14 44 A2 10 1 11 2 H 1 RESISTOR WHEN REQ 4 52a INCOM2 ST M4 0 B2 O 4 Bl o 4 OB 10 OB 11 T INCOM 1 For Digitrip 520MC On...

Страница 37: ...TIES EXPRESSED OR IMPLIED INCLUD ING WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY OR WARRANTIES ARISING FROM THE COURSE OF DEALING OR US AGE OF TRADE ARE MADE REGARDING THE INFOR...

Страница 38: ...Effective 2 2 2001 Page 38 I L 70C1037H03 Cutler Hammer Pittsburgh PAU S A Effective 1 1 2001 Printed in U S A F T N Courtesy of NationalSwitchgear com...

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