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The electronic pdf versions of the documents found through http://www.dnv.com/ are the officially binding versions. Copyright Det Norske Veritas.
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DNV-OS-D202 Automation, Safety, and Telecommunication Systems |
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| Ch.2: Technical Provisions |
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| Sec.4: Component Design and Installation |
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| B: Environmental Conditions, Instrumentation |
Ch.2 Sec.4 B
| Table B1 Parameter class for the different locations on board | ||
| Parameter | Class | Location |
| Temperature | A | Machinery spaces, control rooms, accommodation, bridge |
| B | Inside cabinets, desks, etc. with temperature rise of 5°C or more installed in location A | |
| C | Pump rooms, holds, rooms with no heating | |
| D | Open deck, masts and inside cabinets, desks etc. with a temperature rise of 5°C or more installed in location C | |
| Humidity | A | Locations where special precautions are taken to avoid condensation |
| B | All locations except as specified for location A | |
| Vibration | A | On bulkheads, beams, deck, bridge |
| B | On machinery such as internal combustion engines, compressors, pumps, including piping on such machinery | |
| C | Masts | |
| EMC | A | All locations except as specified for bridge and open deck |
| B | All locations including bridge and open deck | |
| Components and systems designed in compliance with IEC environmental specifications for ships, Publication No. 60092-504 (1994), and for EMC, IEC Publication No. 60533, may be accepted after consideration. | ||
Guidance note: ---e-n-d---o-f---G-u-i-d-a-n-c-e---n-o-t-e---
For details on environmental conditions for instrumentation,
see Certification Note No. 2.4.
Navigation and radio equipment should comply with IEC Publication
No. 60945.
For EMC only, all other bridge-mounted equipment; equipment in
close proximity to receiving antennas, and equipment capable of
interfering with safe navigation of the vessel/unit and
with radio-communications should comply with IEC Publication No. 60945
(1996) Clause 9 (covered by EMC class B).
| — | 3 interruptions during 5 minutes |
| — | switching-off time 30 s each case. |
| — | combination of permanent frequency
variations of ±5% and permanent voltage variations of +6 / -10% of nominal |
| — | combination of frequency transients (5 s duration) ±10% of nominal and voltage transients (1.5 s duration) ±20% of nominal. |
| — | voltage tolerance continuous ±10% of nominal |
| — | voltage transients cyclic variation 5% of nominal |
| — | voltage ripple 10%. |
| — | +30% to -25% for equipment connected to battery during charging |
| — | +20% to -25% for equipment connected to battery not being charged |
| — | voltage transients (up to 2 s duration) ±25% of nominal. |
| — | frequency range 3 to 100 Hz |
| — | amplitude 1 mm (peak value) below 13.2 Hz |
| — | acceleration amplitude 0.7 g above 13.2 Hz. |
| — | frequency range 3 to 100 Hz |
| — | amplitude 1.6 mm (peak value) below 25 Hz |
| — | acceleration amplitude 4.0 g above 25 Hz. |
| — | frequency range 3 to 50 Hz |
| — | amplitude 3 mm (peak value) below 13.2 Hz |
| — | acceleration amplitude 2.1 g above 13.2 Hz. |
Guidance note: ---e-n-d---o-f---G-u-i-d-a-n-c-e---n-o-t-e---
Electrical and electronic equipment should be designed to
function without degradation or malfunction in their intended electromagnetic
environment. The equipment should not adversely affect the operation
of, or be adversely affected by any other equipment or systems used
on board or in the vicinity of the vessel. Upon installation, it
may be required to take adequate measures to minimise the electromagnetic
noise signals, see Classification Note No. 45.1. Such measures may
be in form of a list of electromagnetic noise generating- and sensitive
equipment, and an estimate on required noise reduction, i.e. an
EMC management plan. Testing may also be required to demonstrate electromagnetic
compatibility.
Ch.2 Sec.4 B
| Table B2 Minimum immunity requirements for equipment | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Port | Phenomenon | Basic Standard | Performance criteria | Test value | A.C. power | Conducted low frequency | interference IEC 60945 | A | 50 - 900 Hz: 10% A.C. supply voltage 900
- 6000 Hz: 10 - 1% A.C. supply voltage6 - 10 kHz: 1% A.C.
supply voltage | Electrical fast transient (Burst) | IEC 61000-4-4 | B | 2 kV3) | Surge voltage | IEC 61000-4-5 | B | 0.5 kV 1) /1
kV 2) | Conducted radio frequency | interference IEC 61000-4-6 | A | 3 Vrms3);
(10 kHz)6) 150 kHz -
80 MHz sweep rate £ 1.5 x 10-3 decade/s7)modulation 80% AM
(1 kHz) | D.C. power | Conducted low frequency | interference IEC 60945 | A | 50 Hz - 10 kHz : 10% D.C. Supply voltage | Electrical fast transient (Burst) | IEC 61000-4-4 | B | 2 kV 3) | Surge voltage | IEC 61000-4-5 | B | 0.5 kV 1) /1
kV 2) | Conducted radio frequency | interference IEC 61000-4-6 | A | 3 Vrms3);
(10 kHz)6) 150 kHz -
80 MHz sweep rate £ 1.5 x 10-3 decade/s7) modulation 80% AM
(1 kHz) | I/O ports, signal or
control | Electrical fast transient (Burst) | IEC 61000-4-4 | B | 1 kV 4) | Conducted radio frequency | interference IEC 61000-4-6 | A | 3 Vrms3);
(10 kHz)6) 150 kHz -
80 MHz sweep rate £ 1.5 x 10-3 decade/s7) modulation 80% AM
(1 kHz) | Enclosure | Electrostatic discharge (ESD) | IEC 61000-4-2 | B | 6 kV contact/8 kV air | Electromagnetic field | IEC 61000-4-3 | A | 10 V/m5)
80 MHz-2 GHz sweep rate £ 1.5 x 10-3 decade/s7) modulation 80% AM
(1 kHz) |
Performance criterion B: The EUT is to continue to operate as intended after the test. No degradation of performance or loss of function is allowed as defined in the relevant equipment standard and in the technical specification published by the manufacturer. During the test, degradation or loss of function or performance that is self recoverable is however allowed but no change of actual operating state or stored data is allowed. | |||||
Ch.2 Sec.4 B
| Table B3 Maximum emission requirements for equipment | ||||||||||||||||||||
| Class | Location | Port | Frequency Range (Hz) | Limits | A | All locations except bridge
and open deck | Enclosure(Radiated Emission) | 150 k - 30 M | 30 - 100 M 100 M - 2 G except: 156 - 165 M 80 - 50 dBV/m | 60 - 54 dBV/m 54 dBV/m 24 dBV/m Power (Conducted Emission) | 10 - 150 k | 150 - 500 k 500 k - 30 M 120 - 69 dBV | 79 dBV 73 dBV B | All locations including bridge
and open deck | Enclosure (Radiated Emission) | 150 - 300 k | 300 k - 30 M 30 M - 2 G except: 156 - 165 M 80 - 52 dBV/m | 52 - 34 dBV/m 54 dBV/m 24 dBV/m Power (Conducted Emission) | 10 - 150 k | 150 - 350 k 350 k - 30 M 96 - 50 dBV | 60 - 50 dBV 50 dBV |
Ch.2 Sec.4 B
| Table B4 Inclinations - Ship shaped units | ||||
| Installations, components | Angle of inclination (degrees)1) | |||
| Athwartships | Fore and aft | |||
| Static | Dynamic | Static | Dynamic | |
| Main and auxiliary machinery | 15 | 22.5 | 5 | 7.5 |
| Safety equipment, for example emergency power installations, emergency fire pumps and their devices, electronic appliances 2) and remote control system | 22.5 | 22.5 | 10 | 10 |
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| — | acceleration |
| — | fire |
| — | explosive atmosphere |
| — | temperature shock |
| — | wind, rain, snow, ice, dust |
| — | audible noise |
| — | mechanical shock or bump forces equivalent to 20 g of 10 ms duration |
| — | splash and drops of liquid |
| — | corrosive atmospheres. |
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