VK2000-build

Firing Control VK-200, Ve-Ka Ovenbouw

Wiring

1. N and single 220volt L via switch; black and blue
2. 2x for the thermocouple - orange cable; white and brown
3. 2x Normally open relays to switch a load contactor
4. Earth wire

On a Harting HAN7Da connector.

RCD / Aardlekschakelaar

40A, 500mA residual current detector/aartlekschakelaar in de loop. It sits in the path to the 4+1 IEC wall socket.

kWh meter

Dit is een DTS353 -- https://www.rdlmeters.com/product/dts353/ met een Wat-uur puls uitgang. Deze is vermoedelijk low-voltage open collector. Plan is te beginnen met 5volt en een pull up weerstand.

Sensor

• Nenniger GmbH, Berlin, Hochtemperatur S-Type Thermocouple
• Special type of cable for this (orange)

Hitte Sensor

een FIT-NP5R dry-relay (NO, NC) sokkel met een FITH-23010 hitte sensor.

Manuals as shipped

Actual manuals that were shipped with the unit (please keep)

VK2000 Control signals

Our version has 2 relays; with an NO to the 'L'.

1. Earth wire (yellow/green)
2. Neutral wire (for the AC/DC) (blue)
3. L wire (for AC/DC and as the feed of the relay outputs) (brown)
4. Relay 1 out -- switching to L (black)
5. Relay 2 out -- Switching to L (green)
6. Purple wire - not connected
7. Orange wire - white/brown - Pt

Manual

Wiring Oven side =

Harting style 6+1 connector carrying 3 phase power and relay control signal

• 2 pins for Neutral and Switch (relay)
• 3 pins for the 3 phases
• E pin for Earth

todo

Probably needs a snubber

Risks

Inherent

1. Heat runaway (CPU fault, contacts welded)
2. Faulty thermocouple causing heat runaway / instability / cracking
3. Contact with water/leak
4. Material falling onto it / other people working too near / unclear that is hot

Operator driven

1. Flammable material near
2. Hot handles, etc
3. Dust
4. Unclear it is on / hot
5. Opening while hot
6. Bare wire touching
7. Looking into it / infrared radiation
8. Toppling, bumping, people/things pushed into it

Measures

1. Earth leak trip/detector (touching bare metal)
2. Heat sensor above oven
3. Heat fuse 1 (firing relay), heat fuse 2 (interlock)
4. Emergency button
5. VK2000 validates heat/cool & stops firing outside control range
6. Check ACNode for current & firing
7. Overcurrent protection
8. No unknown/uncontrolled states on powerup / after powerlock
9. Instructions
10. Signage (eye, heat, ..)
11. Safe location