01 [Technical data sheet] The standard Masterpact circuit breakers are very robust devices, designed to insure a high level of discrimination with the downstream protection devices. This requires tripping curves which are not adapted to offer on the same time coordination with downstream contactors. Masterpact NW H1T, H1TH and NT H2T circuit breakers have an adjusted tripping curve to offer coordination with the Tesys F contactors. The adjustment of the tripping curve concerns: p a low threshold integrated instantaneous protection p predefined settings for the long-time, short-time and instaneous releases (current and time). Applying these settings and sealing the adjustments of the control unit are a must to insure the coordination with the Tesys F contactors. Based on our experience, the use of a contactor between the generator and the transformer is mandatory in the DFIG design for wind turbine applications. On the same time, this solution offers important benefits like a much higher electrical endurance than the use of the circuit breaker alone for protection and switching. Please consult the “Low voltage switchgear in wind turbines” application note ref. COMLVP75_EN for more details about coordination and about the switchgear selection. Masterpact NW and NT circuit breakers for coordination with Tesys F contactors
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01[Technical data sheet]
The standard Masterpact circuit breakers are very robust devices, designed to insure a high level of discrimination with the downstream protection devices. This requires tripping curves which are not adapted to offer on the same time coordination with downstream contactors. Masterpact NW H1T, H1TH and NT H2T circuit breakers have an adjusted tripping curve to offer coordination with the Tesys F contactors.
The adjustment of the tripping curve concerns: p a low threshold integrated instantaneous protection p predefined settings for the long-time, short-time and instaneous releases
(current and time). Applying these settings and sealing the adjustments of the control unit are a must to insure the coordination with the Tesys F contactors.
Based on our experience, the use of a contactor between the generator and the transformer is mandatory in the DFIG design for wind turbine applications. On the same time, this solution offers important benefits like a much higher electrical endurance than the use of the circuit breaker alone for protection and switching.
Please consult the “Low voltage switchgear in wind turbines” application note ref. COMLVP75_EN for more details about coordination and about the switchgear selection.
Masterpact NW and NT circuit breakers for coordination with Tesys F contactors
02Masterpact NW and NT circuit breakers for coordination with Tesys F contactors [Technical data sheet]
Masterpact NW H1T, H1TH and NT H2 circuit breakers characteristics (altitude from 0 to 2000 m)
Version Drawout FixedConnection Front or rear horizontal Rear vertical Front or rear horizontal Rear verticalTemp. Ti 40 45 50 55 60 40 45 50 55 60 40 45 50 55 60 40 45 50 55 60
Common characteristicsNumber of poles 3Installation mode H1T Fixed or drawout
H1TH FixedRated insulation voltage (V) Ui 1000Impulse withstand voltage (kV) Uimp 12Rated operational voltage (V AC 50/60 Hz) Ue 690Suitability for isolation IEC 60947-2 Degree of pollution IEC 60664-1 4
Circuit-breaker as per IEC 60947-2 NW16 H1T or H1TH
NW20 H1T or H1TH
NW25 H1T or H1TH
NW32 H1T or H1TH
NT16 H2T
Rated current (A) In at 40 °C/50 °C (1) 1600 2000 2500 3200 1600Sensor ratings (A) 1600 2000 2500 3200 1600Type of circuit breaker
Ultimate breaking capacity (kA rms) Icu 220/440 V 65 50V AC 50/60 Hz 525 V 65 42
690 V 65 42Rated service breaking capacity Ics % Icu 100 % 100 %Utilisation category A ARated short-time withstand current (kA rms) Icw 1 s 10 10Integrated instantaneous protection (kA peak ±10 %) 22 22Rated making capacity (kA peak) Icm 220/440 V 143 105V AC 50/60 Hz 525/690 V 143 88Mechanical and electrical durability as per IEC 60947-2 at In/Ie
NW16 NW20 NW25 NW32 NT16
Service life Mechanical with specific maintenance 25 25 25 25 25C/O cycles x 1000 with regular maintenance 12.5 12.5 12.5 12.5 12.5Type of circuit breaker NW16 NW20 NW25 NW32 NT16 Rated current In (A) 1600 2000 2500 3200 1600
C/O cycles x 1000 Electrical 690 V H1T 10 6 2.5 2.5 -IEC 60947-2 H2T - - - - 3
H1TH 0.5 0.5 0.5 0.5 -(1) 50 °C: rear vertical connected. Please refer to the temperature derating tables for other connection types or for other temperatures.The sources of derating to be considered are the type of connection, the temperature and the altitude.
DimensionsW (mm) H (mm) D (mm)3P 4P
Drawout device800 to 3200 A 441 556 439 395Fixed device800 to 3200 A 422 537 352 297
Drawout circuit breaker Fixed circuit breaker
WD
W
D
Ui 1000V
Ics = 100% Icu
220/440 65480/690 65
Icw 10kA/1s cat.A
Ue Icu(V) (kA)
Masterpact
Uimp 12kVNW25 H1T
UTE VDE BS CEI UNE AS NEMAIEC 60947-2 50/60Hz
IEC 60947-3 50/60Hz
Ue
AC23A
Ie
2500690(V) (A)
Temperature deratingThe table below indicates the maximum current rating at an altitude up to 2000 m, for each connection type, as a function of Ti around the circuit breaker and the busbars.
Circuit breakers with mixed connections have the same derating as horizontally connected breakers.For Ti greater than 60 °C, please consult us.Ti: temperature around the circuit breaker and its connection.
03Masterpact NW and NT circuit breakers for coordination with Tesys F contactors [Technical data sheet]
2000(m)
Masterpact NW H1TH is a reinforced version of Masterpact NW H1T in terms of breaking capacity and isolation, able to operate up to 690 V AC at high altitude, between 2000 and 5000 m.
At altitudes higher than 2000 meters, the ambient air modifications (electrical resistance, cooling capacity) lower the below characteristics as follows:
Altitude (m) 2000 3000 4000 5000Impulse withstand voltage Uimp (kV) 12 11 10 8Rated insulation voltage (Ui) 1000 900 780 700Maximum rated operationnal voltage 50/60 Hz Ue (V)
NW H1TNT H2T
690 690 630 560
NW H1TH 690 690 690 690Rated current 40 °C 1 x In 0.99 x In 0.96 x In 0.94 x In
The altitude impact on these breaker characteristics together with the availability of NW H1TH in fixed version only lead to the specific restrictions below, in order to avoid any possible electrical arc priming on the breaker top power connections while breaking a short-circuit.
Specific restrictions for NW H1TH circuit breakers p Front connections are forbidden p The use of inter-phase barriers is mandatory (delivered in standard with
the circuit breaker) p The respect of the safety clearances and of the installation
recommendations below is mandatory
Safety clearances for H1THInsulated parts Metal parts Energised parts
A 200 300 500B 80 120 250
Upstream connection bars must be isolated on a D + E length:Length
C u 100 mmD 300 mmE 50 mm
Part numbersFixed version Part numbers Drawout version Part numbers
NW16 H1T 3P 47655 NW16 H1T 3P 47625H1TH 3P 47658
NW20 H1T 3P 47656 NW20 H1T 3P 47626H1TH 3P 47659
NW25 H1T 3P 48204 NW25 H1T 3P 48216H1TH 3P 47660
NW32 H1T 3P 48205 NW32 H1T 3P 48217H1TH 3P 47661
NT16 H2T 3P 47199 NT16 H2T 3P 47219
C
D
E
04Masterpact NW and NT circuit breakers for coordination with Tesys F contactors [Technical data sheet]
Maintenance requirements according to operating conditionsWind turbine operating conditions involve various environmental stresses: wide temperature variations, humidity, vibrations (low frequency and high frequency) and electrical stresses: frequent electrical transient phenomena due to connection and disconnection, high frequency voltage disturbance caused by converters, etc.
Ambient temperatureMasterpact devices can operate under the following temperature conditions:
p the electrical and mechanical characteristics are stipulated for ambient temperatures of -25 °C to +70 °C
p circuit breaker closing is guaranteed down to -35 °C by manual operation (pushbutton)Storage conditions are as follows:
p -40 °C to +85 °C for a Masterpact device without its control unit p -25 °C to +85 °C for the control unit.
Extreme atmospheric conditionsMasterpact devices have successfully passed the tests defined by the following standards for extreme atmospheric conditions:
p IEC 60068-2-1: dry cold at -40 °C p IEC 60068-2-2: dry heat at +85 °C p IEC 60068-2-30: damp heat (temperature +55 °C, relative humidity 95 %) p IEC 60068-2-52 level 2: salt mist.
VibrationsMasterpact devices have successfully passed the tests defined by the following standards:
p IEC 60068-2-6 for the levels. p 2 to 13.2 Hz: amplitude ±1 mm. p 13.2 to 100 Hz: constant acceleration 0.7 g.
Non-standard vibration environments require special attention. If no specific adaptation is implemented on the installation to reduce the stress on the breaker to standard conditions, the product’s performance may be impacted. Excessive vibration may cause tripping, breaks in connections or damage to mechanical parts.
We strongly recommend installing Masterpact in such a way that environmental stresses are within tested limits.Masterpact installation shall be designed in order to reduce vibration in particular (mechanical decoupling from power converter).To maintain Masterpact's operating and safety characteristics from the begining to the end of its service life, Schneider Electric requests that systematic checks and periodic maintenance be carried out by qualified personnel, as indicated in the "Masterpact maintenance guide".
MasterpactNT and NWCircuit breakers and switch-disconnectors
Low voltage electrical distribution
Maintenance guide06/2012
Masterpact NW and NT circuit breakers for coordination with Tesys F contactors [Technical data sheet]
Notes
Schneider Electric Industries SAS35, rue Joseph MonierCS 30323F- 92506 Rueil Malmaison Cedex
RCS Nanterre 954 503 439Capital social 896 313 776 €www.schneider-electric.com
04-2013COM-POWER NW H1T-H1TH, NT H2T with Tesys F - TDS25
As standards, specifications and designs change from time to time, please ask for confirmation of the information given in this publication.
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Designed: Schneider ElectricPhotos: Schneider Electric
