Togami Electric Mfg. Co., Ltd.

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Togami Electric Mfg. Co., Ltd.

PRODUCTS

　　
Explosion-proof control switches

PBZ

Explosion-proof control switches

CZ

Explosion-Proof Control Switches
(Cast-iron Model)

Cast-iron explosion-proof control switches with an explosion protection rating of d2G4※.

※ Electrical Equipment Explosion-Proof Design Standard (Japan)

　　

Model type

Type Material Accessories Hazardous location Explosion-proof construction
CZ Cast-iron operating push-button, indicating lamp, changeover switch, ammeter Applicable in hazardous locations class 1 and 2 d2G4
PZ operating push-button, indicating lamp, changeover switch
PBZ operating push-button
　　

Specifications

　　　　　　　　　　　　　　　　　
Type CZ・PZ・PBZ
Explosion-proof performance d2G4
Water-proof performance Explosion-proof for outdoor（technical guide RⅡS-TR-79-1）
Material（case） Cast-iron (steel plate for exterior dimension drawing No. 18 only)
Insulation resistance More than 5 MΩ（by 500 VDC megger）
Standard service condition
(technical guide RⅡS-TR-79-1）		 Altitude: Max. 1,000 m
Ambient temperature：-10 ℃ to +40 ℃
Relative humidity：45% to 85％
　　　　　　　　　　　　　　　　　

Dimensions

　



　 CZ
　　 　　 　　　　　 　　 　 　 　　　 　　　 　　　 　　　 　　 　　
Type CZ（with ammeter）
Dimensions No. Dwg.3 Dwg.4 Dwg.8 Dwg.9 Dwg.13 Dwg.14 Dwg.15 Dwg.16 Dwg.17 Dwg.18
Wall mounting type（D・B） without drip-proof cover A 100 154 232 302
B 384.5
（362.5）		 378(356) 418(396) 504(493) 546
C 109 132 172 224
with drip-proof cover D 106 173 195 275 375
E 389
（367）		 387(365) 427(405) 512(501) 555
F 160 176 236 275
Mounting G 120 154 220 270
H 200 230 270 250 350
I 67 54 61 98 97
Mounting holes 4－φ9 4－φ14
Explosion-proof seal seating groove J Max.67 Max.65 Max.85 Max.90
Heavy gauge steel socket Max.36×1 Max.36×2 Max.36×2、28×3 Max.36×3
Earth terminalM6M8
Cover retaining bolts M8M10M12
Weight（kg） 11 192029 30 45
Standing type（E・K） K 1500
Mounting frame L φ210 φ220
M φ190 φ200
Pipe diameter 1 1/2 2 1/2 3 3B
Weight（kg） 15 28 29 43 44 60
　 PZ・PBZ
　　 　　 　　　　　 　　 　　　 　　　 　　 　　
Type PZ（without ammeter） PBZ（operating push button）
Dimensions No. Dwg.5 Dwg.6 Dwg.7 Dwg.10 Dwg.11 Dwg.12 Dwg.1 Dwg.2
Wall mounting type（D・B） without drip-proof cover A 154 232 100
B 378(356) 418(396) 504(493) 300.5(278.5) 384.5(362.5)
C 132 172 114 109
with drip-proof cover D 173 195 275 106
E 387(365) 427(405) 512(501) 309.5(287.5) 389(367)
F 176 236 165 160
Mounting G 154 220 100 120
H 230 270 250 150 200
I 54 61 98 55 67
Mounting holes 4－φ9
Explosion-proof seal seating groove J Max.65 Max.85 Max.67
Heavy gauge steel socket Max.36×2 Max.36×2、28×3 Max.36×1
Earth terminalM6
Cover retaining bolts M10M12 M8
Weight（kg） 1920 29 8 11
Standing type（E・K） K 1500 1000 1500
Mounting frame L φ210 φ220 φ135 φ210
M φ190 φ200 φ110 φ190
Pipe diameter 2　1/2 3 1　1/2
Weight（kg） 28 29 43 12 15

Specifications list

　 Accessories
　　 　　 　　 　　 　　
Ammeter60 mm square, 3-times scale, with a red pointer /A or ／5 A with CT rate
(But, it's direct retirement possible to 30 A.)
Push-button switch Rated current 10 A
Operating current 220 VAC-5 A
110 VDC-1.2 A（lagging load）
Color Red(on)-Green(off)
Letter ON-OFF
Contact 1NO-1NC 1NO-1NC
Handle-type
operating switches		 Notch 3
Rated current 10 A
Operating current 220 V,5 AAC
110 VDC,1.2 A（lagging load）
Color Black
Letter ON-OFF
Contact 1NO-1NC 1NO-1NO
Changeover switch Notch Specified by customer
Rated current 10 A
Operating current 220 VAC,5 A
110 VDC,1.3 A（lagging load）
Color Black
Contact Specified by customer
Indicating lamp Bulb Incandescent lamp with transformer
Color Red, green, orange
Voltage 100 VAC,200 VAC,110 VAC,220 VAC,
100 VDC,200 VDC,110 VDC,220 VDC
Painting color Internal and external surfaces of enclosures: Munsell No.7.5BG6/1.5
　 CZ（with ammeter）specifications
　　 　 　　
ClassficationType Dimensions Wiring No. Accessories
D
（Wall mounting conduit leading）		 B
（Wall mounting packing leading）		 E
（Stand packing leading）		 K
（Stand sealing leading）		 Operating switch Ammeter Indicating lamp Changeover switch
Control switch CZD-P011 CZB-P011 CZE-P011 CZK-P011 Dwg.3 W30748 ○ ○ ー ー
〃-P020 〃-P020 〃-P020 〃-P020 Dwg.3 W30749 ○ ○ ー ー
〃-N011 〃-N011 〃-N011 〃-N011 Dwg.4 W30748 ○ ○ ー ー
〃-N020 〃-N020 〃-N020 〃-N020 Dwg.4 W30749 ○ ○ ー ー
〃-N111 〃-N111 〃-N111 〃-N111 Dwg.8 W31303 ○ ○ RL ー
〃-N120 〃-N120 〃-N120 〃-N120 Dwg.8 W31304 ○ ○ 〃 ー
〃-N211 〃-N211 〃-N211 〃-N211 Dwg.8 W30759 ○ ○ GL.RL ー
〃-N220 〃-N220 〃-N220 〃-N220 Dwg.8 W31300 ○ ○ 〃 ー
〃-NH011 〃-NH011 〃-NH011 〃-NH011 Dwg.9 W31309 ○ ○ ー ー
〃-NH020 〃-NH020 〃-NH020 〃-NH020 Dwg.9 W31310 ○ ○ ー ー
〃-QH111 〃-QH111 〃-QH111 〃-QH111 Dwg.13 W31341 ○ ○ RL ー
〃-QH120 〃-QH120 〃-QH120 〃-QH120 Dwg.13 W31342 ○ ○ 〃 ー
〃-QH211 〃-QH211 〃-QH211 〃-QH211 Dwg.13 W31311 ○ ○ GL.RL ー
〃-QH220 〃-QH220 〃-QH220 〃-QH220 Dwg.13 W31312 ○ ○ 〃 ー
〃-QH311 〃-QH311 〃-QH311 〃-QH311 Dwg.13 W31352 ○ ○ GL.OL.RL ー
〃-QH320 〃-QH320 〃-QH320 〃-QH320 Dwg.13 W31353 ○ ○ 〃 ー
〃-Q011G 〃-Q011G 〃-Q011G 〃-Q011G Dwg.14 W31319-1
W31319-2
W31319-3		 ○ ○ ー ○
〃-Q020G 〃-Q020G 〃-Q020G 〃-Q020G Dwg.14 W31320-1
W31320-2
W31320-3		 ○ ○ ー ○
〃-Q021 〃-Q021 〃-Q021 〃-Q021 Dwg.15 W30750 ○ ○ ー ー
〃-Q121 〃-Q121 〃-Q121 〃-Q121 Dwg.16 W31340 ○ ○ RL ー
〃-Q221 〃-Q221 〃-Q221 〃-Q221 Dwg.16 W30756 ○ ○ GL.RL ー
〃-Q321 〃-Q321 〃-Q321 〃-Q321 Dwg.16 W31337 ○ ○ GL.OL.RL ー
〃-Q311 〃-Q311 〃-Q311 〃-Q311 Dwg.16 W31338 ○ ○ 〃 ー
〃-Q320 〃-Q320 〃-Q320 〃-Q320 Dwg.16 W31339 ○ ○ 〃 ー
〃-QH311G 〃-QH311G 〃-QH311G 〃-QH311G Dwg.17 W31354-1
W31354-2
W31354-3		 ○ ○ 〃 ○
〃-QH320G 〃-QH320G 〃-QH320G 〃-QH320G Dwg.17 W31355-1
W31355-2
W31355-3		 ○ ○ 〃 ○
〃-QH211G 〃-QH211G 〃-QH211G 〃-QH211G Dwg.17 W31356-1
W31356-2
W31356-3		 ○ ○ GL.RL ○
〃-QH220G 〃-QH220G 〃-QH220G 〃-QH220G Dwg.17 W31357-1
W31357-2
W31357-3		 ○ ○ 〃 ○
〃-QH111G 〃-QH111G 〃-QH111G 〃-QH111G Dwg.17 W31358-1
W31358-2
W31358-3		 ○ ○ RL ○
〃-QH120G 〃-QH120G 〃-QH120G 〃-QH120G Dwg.17 W31359-1
W31359-2
W31359-3		 ○ ○ 〃 ○
〃-N111G 〃-N111G 〃-N111G 〃-N111G Dwg.18 W31334-1
W31334-2
W31334-3		 ○ ○ 〃 ○
〃-N120G 〃-N120G 〃-N120G 〃-N120G Dwg.18 W31335-1
W31335-2
W31335-3		 ○ ○ 〃 ○
〃-N211G 〃-N211G 〃-N211G 〃-N211G Dwg.18 W31327-1
W31327-2
W31327-3		 ○ ○ GL.RL ○
〃-N220G 〃-N220G 〃-N220G 〃-N220G Dwg.18 W31328-1
W31328-2
W31328-3		 ○ ○ 〃 ○
〃-N311G 〃-N311G 〃-N311G 〃-N311G Dwg.18 W31344-1
W31344-2
W31344-3		 ○ ○ GL.OL.RL ○
〃-N321G 〃-N321G 〃-N321G 〃-N321G Dwg.18 W31336-1
W31336-2
W31336-3		 ○ ○ 〃 ○
　 PZ・PBZ（without ammeter）specifications
　　 　 　　 　　
ClassficationType Dimensions Wiring No. Accessories
D
（Wall mounting conduit leading）		 B
（Wall mounting packing leading）		 E
（Stand packing leading）		 K
（Stand sealing leading）		 Operating switch Ammeter Indicating lamp Changeover switch
Push-button switch PBZD-N10 PBZB-N10 PBZE-N10 PBZK-N10 Dwg.1 W31346 ○ ー ー ー
〃-N01 〃-N01 〃-N01 〃-N01 Dwg.1 W31347 ○ ー ー ー
〃-N11 〃-N11 〃-N11 〃-N11 Dwg.1 W30730 ○ ー ー ー
〃-N20 〃-N20 〃-N20 〃-N20 Dwg.1 W30731 ○ ー ー ー
〃-N21 〃-N21 〃-N21 〃-N21 Dwg.2 W31302 ○ ー ー ー
Control switch PZD-N111 PZB-N111 PZE-N111 PZK-N111 Dwg.5 W31307 ○ ー RL ー
〃-N120 〃-N120 〃-N120 〃-N120 Dwg.5 W31308 ○ ー 〃 ー
〃-N211 〃-N211 〃-N211 〃-N211 Dwg.5 W30735 ○ ー GL.RL ー
〃-N220 〃-N220 〃-N220 〃-N220 Dwg.5 W30737 ○ ー 〃 ー
〃-NH111 〃-NH111 〃-NH111 - Dwg.6 W31315 ○ ー RL ー
〃-NH120 〃-NH120 〃-NH120 Dwg.6 W31316 ○ ー 〃 ー
〃-NH211 〃-NH211 〃-NH211 Dwg.6 W31317 ○ ー GL.RL ー
〃-NH220 〃-NH220 〃-NH220 Dwg.6 W31318 ○ ー 〃 ー
〃-N011G 〃-N011G 〃-N011G PZK-N011G Dwg.7 W31321-1
W31321-2
W31321-3		 ○ ー ー ○
〃-N020G 〃-N020G 〃-N020G 〃-N020G Dwg.7 W31322-1
W31322-2
W31322-3		 ○ ー ー ○
〃-N111G 〃-N111G 〃-N111G - Dwg.10 W31323-1
W31323-2
W31323-3		 ○ ー RL ○
〃-N120G 〃-N120G 〃-N120G Dwg.10 W31324-1
W31324-2
W31324-3		 ○ ー 〃 ○
〃-N211G 〃-N211G 〃-N211G Dwg.10 W31325-1
W31325-2
W31325-3		 ○ ー GL.RL ○
〃-N220G 〃-N220G 〃-N220G Dwg.10 W31326-1
W31326-2
W31326-3		 ○ ー 〃 ○
〃-Q321 〃-Q321 〃-Q321 PZK-Q321 Dwg.11 W31343 ○ ー GL.OL.RL ー
〃-Q221 〃-Q221 〃-Q221 〃-Q221 Dwg.11 W31332 ○ ー GL.RL ー
〃-Q121 〃-Q121 〃-Q121 〃-Q121 Dwg.11 W31349 ○ ー RL ー
〃-Q311 〃-Q311 〃-Q311 〃-Q311 Dwg.12 W31350 ○ ー GL.OL.RL ー
〃-Q320 〃-Q320 〃-Q320 〃-Q320 Dwg.12 W31351 ○ ー 〃 ー

・Wiring, operation, maintenance, and inspections of these products must be performed by personnel with specialized knowledge and skills in the installation of explosion-proof electrical equipment and related regulations.
・For installations in hazardous locations, please check the applicable hazardous area classification. The hazardous areas in which products may be installed will vary depending on the specific model.
・Please note that specfications, dimensions, etc., are subject to change without prior notice.

For installation of explosion-proof electrical equipment

Prior to installed of explosion-proof electrical equipments, careful study should be made on the following recommendations.
1. To prevent explosions or files caused by the electrical equipments, every effort should be made, as a prerequisite, to minimize possible danger of explosion at a location where they are to be installed.
2. The electrical equipments should be installed at a location with a minimum posibility of explosion. In case, however, they are unavoidably installed at a hazardous location where explosion is expected, it should be limited to a minimum extent.
3. The explosion-proof electrical equipments to be installed should be the products that have been proved to fully meet he requirements.


Classofication of danger class

Study the sorts of inflammable gas or steam present at a location where the electrical equipments are to be installed in order to determine the explosion class and the firing degree. Then, determine the hazardous locations according to the degree of danger of the locations where the electrical equipments are to be installed. The explosion-proof electrical equipments may be selected on the basis of the determination of explosion class, firing degree and hazardous locations.
The danger class of explosive gas is determined by the firing degree and explosion class.

Firing degree Firing point
G1
G2
G3
G4
G5		 over 450 ℃　　　　　　　　
over 300 ℃ up to 450 ℃
over 200 ℃ up to 300 ℃
over 135 ℃ up to 200 ℃
over 100 ℃ up to 135 ℃


Explosion class Minimum clearance which permits flame running at 25 mm.
1
2
3		 over 0.6 mm
over 0.4 mm up to 0.6 mm
up to 0.4 mm


Classofication example of explosive gases

　 G1 G2 G3 G4 G5
1 Ammonia
Carbon monoxide
Acetic acid
Propane
Methane		 Ethanole
Amyl Acetate-iso
1-Buthanole
Butane
Acetic anhydride		 Gasoline
Hexane		 Acetaldehyde
Ethylether		 　
2 Coal gas Ethylene
Ethylene oxide		 　
3 Water gas
Hydrogen		 Acetylene 　

Classification of hazardous locations

The areas of possible danger or to be dangerous atmosphere are classfield into class 0, class 1 and class 2 depending upon the dangerous time and frequency of occurrence of danger.

Class 0･･･Where dangerous density of explosive gas continues or is held for a long time above the lower limit of an explosion.

Class 1･･･Where a dangerous atmosphere is expected to be present under normal state.

Class 2･･･Where a dangerous atmosphere is expected to be present under abnormal state.


Type of explosion-proof construction

The explosion-proof construction is designed to protect the equipment in use at a hazardous location and can be divided into many different types including pressure-resisting explosion-proof(d), oil-immersed explosion-proof(o), internal pressure-resisting explosion-proof(f), increased safety explosion-proof(e), substantial safety explosion-proof(i), special explosion-proof(s) and other varying types. Out of them, the following construction types are employed in the explosion-proof electrical equipment introduced in this paper.

※ Pressure-resisting explosion-proof type(d)
　 This is of a totally enclosed construction, and should an explosion take place inside the enclosure, the enclosure resists the resultant pressure eliminating a danger of igniting an explosive gas outside.
※ Increased safety explosion-proof type(e)
　This is of the construction which is particularly provided with increased safety on its construction or temperature rise, in order to prevent sparking arcing and overheating on those parts which should not essentially generate them.

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