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 Watt-uur puls uitgang.

Deze is vermoedelijk low-voltage open collector. Plan is te beginnen met 3v3 volt en een 4.7 kΩ pull up resistor on the IO port of the node..

Sensor

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

Heat Alarm

heat sensor - location

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

Heat Alarm Manuals as shipped

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

Heat Alarm - Wiring

• Mains - 'tick' cable going to distribution panel
  • L -- Phase 220v, Brown
  • N -- Neutral, 220v, Blue
  • Earth - terminated, Yellow
  • Alert-signal, white -- not connected
• Dry relay - galvanically separate from mains - 'thin' cable going to oven control box
  • Black - common
  • Red - Normally open
  • Blue - Normally closed

VK2000 Control signals

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

1. Earth wire (yellow/green)
   1. Wired to a distribution bar on the back panel
2. Neutral wire (for the AC/DC) (blue)
   1. Wired post the main switch
3. L wire (for AC/DC and as the feed of the relay outputs) (brown)
   1. Wired post the main switch, current limiter and SafetyRelay
4. Relay 1 out -- switching to L (black)
   1. Wired to the main control relay via the red cable *inside* the oven
5. Relay 2 out -- Switching to L (green)
   1. Wired to Opto1 of the NodeCeramic
6. Purple wire - not connected
7. Orange wire - white/brown - Pt
   1. wired to the Pt sensor inside the Oven

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
5. Touching hot material in oven / once out of oven

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
9. Welding equipment nearby that may be flammable
10. Use of the corner by a third party for flammable things (e.g. spray painting)

Measures and Controls

1. Touching bare metal electric coils / electrocution risk
   1. Instructions
   2. Interlock on door/lid (touching bare metal electric coils)
   3. Earth leak trip/detector (touching bare metal electric coils)
2. Runaway heat
   1. VK2000 validates heat/cool & stops firing outside control range
   2. Heat sensor above oven
   3. Heat fuse 1 (firing relay), heat fuse 2 (interlock)
   4. Overcurrent protection
   5. Check ACNode for current & firing
3. Emergency button
   1. Present and relatively far from oven / some shielding by meam
4. No unknown/uncontrolled states on powerup / after powerlock
5. Signage (eye, heat, ..)
   1. Copy part of the documentation
6. Safe location, 2 sides wall
   1. Removal overly hard - presence of beam, welding table, controls screwed to the wall & limited cable length. Spacers behind/between legs and wall
7. Personal Safety Equipment (gloves, safety gogles, welding mask/googles)
8. Mandatory Instructions
   1. Tag system
   2. Instructions can only be entered by those who had instruction or with trustee override