|Certificate Type||Product Description||Certificate|
|Permits of the Republic of Kazakhstan||PVK-A-VEL|
|Maritime Register of Shipping||PVK-A-VEL|
|Fire Safety Certificate||PVK-A-VEL|
The explosionproof push-button stations from modified aluminum alloy of PVK-A-VEL type are intended for remote control of electric drives for machines and
mechanisms in stationary plants and on ground, sea vehicles, where they are driven manually by operator. Together with this stations can be used for signaling associated with
the specified electric drives or other electrical devices and operating supervision for current load of connected current collectors.
Stations of PVK-A-VEL series allows controlling and monitoring of state for several devices simultaneously from one point. These products are recommended for use in chemical, petrochemical, pharmaceutical and other industries, where use of explosionproof equipment is required.
Explosionproof push-button stations of PVK-A-VEL type correspond to the requirements of GOST 12.2.007.0, GOST 30852.0, GOST 30852.1, “Electric Installation Code”, chapter 7.3, as well as a number of other regulatory documents.
Enclosure of PVK station consists of body and cover. Cover is attached to the body with socket head screws. By the Customer’s request inside the enclosure
button cells with contact blocks of BKV type ensuring switching of electric circuits; instruments; switches; light indicators are installed on the cover.
“Stop” button drive is made in mushroom form with self-locking. The main actuator of stations is a contact block. The block has one normally open (NO) and one normally closed (NC) contacts. Terminal clamps (4 pcs.) of the block allow connecting of two wires with cross section up to 4 mm each or one wire with cross section up to 2,5 mm. Cable glands are installed in the body. The body is attached by brackets with entries.
PVK – Х1 – VEL Х2 – Х3 – Х4 – Х5 – Х6 – Х7 – Х8 – Х9 – Х10
Х1 – material of enclosure version:
A – aluminum alloy (enclosure OEAA-VEL-Х-IIB, OEAA-VEL-Х-IIB+H2)
Ts – zinc-aluminum alloy (enclosure OEATs-VEL-Х-PB (IIB))
Х2 – overall dimensions of used enclosure
Х3 – number and type of buttons by nPх-nSх diagram, where n- number of buttons, P – cylindrical button “START” with one normally open contact (1NO), S – mushroom button “STOP” with normally closed contact (1 NC), x -button color (G – green, B – blue, R – red, Bl – black, Y – yellow) If necessary contact diagram shall be indicated.
For standard version “Stop” button has self-locking. For version without self-locking index “(w/o s/l)” shall be indicated additionally.
Х4 – figure indicating explosion protection marking:
1 – PB ExdI
2 – 1ExdIIBT6
11 – 1ExdIIBT6+H2
Х5 – number and type of explosionproof switches by ExGNA(X)xn diagram, where А – nominal current (12, 20, 25), Х – number of switching diagram, n – number of switches (from 2 and more to be indicated).
In case of switch absence index Х5 is not indicated
Х6 – number and color of explosionproof light indicators by nX(U) diagram, where n – number of the required indicators, Х – their color (G – green, B – blue, R – red, Y – yellow, W – white, O – orange), U – supply voltage. In case of indicator absence X6 index shall not be indicated.
Х7 – instrument by the following diagram: Р(Х Х/Х), where Р – instrument: A – amperemeter, V – voltmeter; Х – instrument specifications: instrument type, its measuring scale and connection current. Parameters of integrated instruments are indicated in the order in details. In case of indicator absence X7 index shall not be indicated.
Х8 – number and type of terminal clamps by the following diagram: A/nP, where А – nominal current, n – terminal number, P – index indicating use of spring terminals. For terminal screws “P” index is not specified. In case of terminal absence X8 index shall not be indicated.
Х9 – number and type of cable glands by ( (d)xnX) diagram, where
d – gland type
n – their number
Х – arrangement on enclosure body: A – from the left, V – from above, S – from the right (side D – from below – on default). When using glands of VK-VEL series gland material, its type and dimension shall be indicated.
Х10 is a type of climatic version and arrangement category: U1, HL1, OM1, T1, U5, T5
Explosion protection marking: 1ExdIIBT6, 1ExdIIBT6+H₂, PB Exdl
Material: Cindal, modified zinc alloy, stainless steel
Degree of dust and moisture protection: IP66
Climatic version and arrangement category: U1, HL1, OM1, U5, T5
Operation temperature: working:
for climatic version U1 – from -40 °С to +40 °С
for climatic version HL1 – from -40 °С to +40 °С
for climatic version OM1 – from -60 °С to +45 °С
for climatic version T1 – from -10 °С to +45 °С
for climatic version T5 – from + 1°С to +35 °С
Nominal voltage: up to 660 V
Nominal current: depends on installed components