HUM8PV Pemutus Sirkuit Kasus Moulded Fotovoltaik

Aplikasi

Pemutus sirkuit case molded fotovoltaik HUM8PV (selanjutnya disebut pemutus sirkuit) diterapkan pada sirkuit DC dengan tegangan nominal hingga DC1000 V, dan arus nominal 16A hingga 690A. Dilengkapi dengan fungsi perlindungan delay waktu panjang overload dan perlindungan instan hubung singkat, produk ini dapat mendistribusikan daya listrik, dan melindungi jalur serta peralatan dari kerusakan akibat overload, hubung singkat, dan kegagalan lainnya. Produk ini sesuai dengan standar IEC60947-2.

Kondisi operasi normal

Suhu lingkungan: -25°C~+70°C; suhu rata-rata dalam 24 jam: ≤+35°C
Ketinggian: ≤ 2000m
Kelembaban: Kelembaban relatif udara pada suhu tertinggi +40°C tidak boleh melebihi 50%; Pada suhu terendah dengan kelembaban relatif lebih tinggi, suhu rata-rata bulan terbasah tidak boleh melebihi +25°C, dan kelembaban relatif rata-rata tidak boleh melebihi 90%;
Tingkat polusi: kelas 3
Dipasang di tempat tanpa risiko ledakan, tanpa gas yang dapat mengkorosi logam atau gas yang dapat merusak isolasi, dan dengan debu konduktif yang sedikit
Kategori pemasangan: III

Model dan arti

Model dan arti

Tipe pelepasan dan kode aksesori

Sistem daya untuk mode pengkabelan di atas silakan cek lembar 2.

Parameter teknis utama

Kurva karakteristik proteksi

Kurva karakteristik proteksi suhu arus HUM8PV-125

Kurva karakteristik proteksi suhu arus HUM8PV-250

Kurva karakteristik proteksi suhu arus HUM8PV-400

Kurva karakteristik proteksi suhu arus HUM8PV-690

Koefisien pengurangan kapasitas suhu pada suhu berbeda.

6.The reducing capacity coeficient in high altitude:when the altitude exceeds 2000m,the circuit breaker should be adjusted as sheet4

7.DC system application: the following aspects should be considered before choose breaker in DC system.

a.rated operation voltage, considering cascaded pole number

b.rated current, considering load power

c. breaking capacity, considering maximum short circuit current at mounting site

d. Grounding system mode, see sheet 5

System type		Grounding system		Ungrounding system
All kinds of fault types
Failure effect	Failure l	Generate maximum short circuit current Contact connecting to positive pole break	U/2 voltage produce maximum short circuit current Contact connecting to negative pole break	No effect
	Failure ll	Generate maximum short circuit current All the cascaded contacts break	Generate maximum short circuit current All the cascaded contacts break	Generate maximum short circuit current All the cascaded contacts break
	Failure I	No effect	Same as failure l But only for contact connecting to negative pole	No effect
The worst situation		Failure l	Failure l and Failure ll	Failure ll
Breaking situation		Cascade in positive pole and break together	For each pole,break maximum short circuit current when U/2	Two poles break together

6.Overall and mounting size

1.E type wiring for 3PHUM8PV-125(front connection)

2.H type wiring for 4P HUM8PV-125(front connection)

3.E type wiring for 3P HUM8PV-250(front connection)

4.H type wiring for 4PHUM8PV-250(front connection)

5.E type wiring for 3PHUM8PV-400(front connection)

6.H type wiring for 4P HUM8PV-400 (front connection)

7.E type wiring for 3PHUM8PV-630(front connection)

8.H type wiring for 4P HUM8PV-630(front connection)

7.Accessories

1.Accessories can be provided as per user’s requirement.

2.Shunt release parameters:

Rated voltage Us:AC230V,400V;DC 220-250V,24-30V

Breaker can reliably break at(70%-110%)Us, and action time is 10ms-30ms.

Note:when uses DC24V-30V shunt release, the maximum length of copper line should meet the requirements of sheet 6

3. Rated value of auxiliary contact and alarm contact:

Conventional thermal current Ith=3A;rated working current le=0.79A(AC230V); le=0.47A(AC400V); le=0.15A(DC250V)

4. Parameters of motor operation mechanism see sheet7, total height of motor operation mechanism see sheet 8. The following isthe wiring diagram of motor operation mechanism

The power capacity of motor operation mechanism should be large enough to ensure the voltage impacted on at starting current should be no less than 85%Ue

Wiring diagram of motor operation mechanism

5. Mounting size of rotating handle operation mechanism see sheet 9

Overall and mounting hole drawing of A type(square)handle

Overall and mounting hole drawing of B type(round)handle

Overall and mounting sizes of centralized rotating handle operation mechanism

8.Installation and maintenance

1.Matters need attention before installation:
a.Appearance shall be well and no-loaded action normal; rated value of breaker and accessories should conform to working conditions at mounting site;no obvious shock at mounting site and conform to normal working conditions
b. Insulation test should be taken before ex-factory. Use 1000VDCMo meter to do retest before installation, among poles of circuit breaker,the insulating resistance between the same pole entering and outlet terminal should be no less than 20MΩ at breaking state
2.Cross section area of conductors should exceed the size regulated in sheet10,and the connection bolt should be screwed up.
3.Characteristic of breaker and accessories should meet our order requirements.
4.The breaker handle can turn to“on”,“off”,“trip”position, when it’s “trip”,the handle rotated to “off” direction,then it can do“on”operation.
5.Before add the internal accessories, the breaker tripper should be switch off.

9.Ordering information

1.Product name and model

2. Rated current, release type,instantaneous release setting current multiple

3.Accessories name and specification

FAQ

What is a moulded case circuit breaker?

A moulded case circuit breaker (MCCB) is a protective device enclosed in a moulded housing. It provides overcurrent and short-circuit protection for electrical circuits, with adjustable trip settings and higher breaking capacities than miniature circuit breakers.

What is a photovoltaic circuit breaker?

A photovoltaic circuit breaker is specifically designed for DC solar applications. It handles the unique characteristics of PV systems — higher DC voltages (up to 1000V or 1500V DC), non-zero-crossing DC arc extinction, and continuous load variations from solar irradiance.

What is the difference between a circuit breaker and a molded case breaker?

A “circuit breaker” is a general term for any automatic overcurrent protection device. A “molded case circuit breaker” (MCCB) is a specific type — housed in a moulded insulating casing, with higher current ratings (up to several thousand amps), adjustable trip settings, and higher breaking capacities than miniature circuit breakers (MCBs).

Which is better, ACB or MCCB?

Neither is universally “better” — they serve different applications. ACB (Air Circuit Breaker) is used for low-voltage main distribution (high current, up to 6300A), with adjustable protection and high breaking capacity. MCCB (Moulded Case Circuit Breaker) is used for branch circuit protection (up to 1600A), more compact and cost-effective for feeder circuits. Choose based on application current rating and protection requirements.